Photonics

COORDINATOR

Ahufinger Breto, Veronica

CONTACT

Natalia García Tusquellas
The Institute of Photonic Sciences (ICFO)
Av. Carl Friedrich Gauss, 3
08860 Castelldefels

Tel: (+34) 93 554 22 10
E-mail: academicaffairs@icfo.eu

http://phd.icfo.eu/

Photonics is the science that studies light and its generation, propagation, manipulation and interaction with matter. The discipline produces multidisciplinary technology with applications in communications, industry, nanotechnology, biology, medicine and other fields. In recent decades, photonics has given rise to a myriad of applications that have a positive impact on our lives, even at the most everyday level. Examples of photonic solutions to present-day challenges include modern fibre optics–based communications systems, optical diagnostic and therapeutic tools used in medicine, laser-based production methods, metrology and optical sensors, and photovoltaic energy.

.The doctoral programme in Photonics of the Universitat Politècnica de Catalunya (UPC) is delivered by the Institute of Photonic Sciences (ICFO) within the framework of the UPC Doctoral School. The ICFO is a research centre dedicated to the study of light sciences and technologies and has been recognised as a Severo Ochoa Centre of Excellence. Founded in 2002 by the Government of Catalonia and the UPC, the ICFO also hosts ambitious patronage programmes funded by the Cellex and Mir-Puig foundations of Barcelona. The Institute has a threefold mission: frontier research, knowledge and technology transfer, and postgraduate training, mainly at the doctoral level. The ICFO is currently one of the leading centres in the world in its field.

Theses are completed in the four research areas at the core of the doctoral programme in Photonics: biomedical photonics, quantum optics, nonlinear optics and nanophotonics. These four research areas focus primarily on photonic applications in healthcare, renewable energies and information technologies. Research is carried out within the framework of long-term programmes and medium-term projects in a range of fields, including quantum information technologies, advanced screens, nanophotonic devices, graphene photonics, remote sensors, solar cells, optoelectronics, integrated optics, ultrafast optics, super-resolution imaging techniques, and biomedical technologies for diagnosis and therapy.

General information

Access profile

The doctoral programme in Photonics is designed for students with outstanding academic records at the international level who wish to complete a doctoral project in a field related to photonics.

With respect to entrance qualifications, it should be noted that photonics is a very broad discipline and that the ICFO is made up of a number of research groups that work in the various branches of the photonic sciences. Accordingly, the doctoral programme in Photonics is open to applicants with a wide range of qualifications, including degrees in physics; electronic, electrical, materials and telecommunications engineering; mathematics, chemistry, biology, bioengineering and biophysics.

As for language skills, the ICFO is a research institute with a strongly international character and English is the language used for everyday communication. Students admitted to the doctoral programme in Photonics must therefore have a high level of written and spoken English.

As for career goals, the doctoral programme in Photonics admits both students who wish to pursue academic careers and those aiming to become future leaders in knowledge and technology transfer or R&D in the business environment.

When it comes to personal characteristics, we are looking for students with high potential, motivation and the drive to carry out a project of excellence at the highest international level.

Output profile

Doctoral candidates who complete a doctoral degree will have acquired the following competencies, which are needed to carry out quality research (Royal Decree 99/2011, of 28 January, which regulates official doctoral studies):

a) A systematic understanding of the field of study and a mastery of the research skills and methods related to the field.
b) An ability to conceive, design or create, put into practice and adopt a substantial process of research or creation.
c) An ability to contribute to pushing back the frontiers of knowledge through original research.
d) A capacity for critical analysis and an ability to assess and summarise new and complex ideas.
e) An ability to communicate with the academic and scientific community and with society in general as regards their fields of knowledge in the manner and languages that are typical of the international scientific community to which they belong.
f) An ability to foster scientific, technological, social, artistic and cultural progress in academic and professional contexts within a knowledge-based society.

The award of a doctoral degree must equip the graduate for work in a variety of settings, especially those requiring creativity and innovation. Doctoral graduates must have at least acquired the personal skills needed to:

a) Develop in contexts in which there is little specific information.
b) Find the key questions that must be answered to solve a complex problem.
c) Design, create, develop and undertake original, innovative projects in their field.
d) Work as part of a team and independently in an international or multidisciplinary context.
e) Integrate knowledge, deal with complexity and make judgements with limited information.
f) Offer criticism on and intellectually defend solutions.

Finally, with respect to competencies, doctoral students must:
a) have acquired advanced knowledge at the frontier of their discipline and demonstrated, in the context of internationally recognised scientific research, a deep, detailed and well-grounded understanding of theoretical and practical issues and scientific methodology in one or more research fields;
b) have made an original and significant contribution to scientific research in their field of expertise that has been recognised as such by the international scientific community;
c) have demonstrated that they are capable of designing a research project that serves as a framework for carrying out a critical analysis and assessment of imprecise situations, in which they are able to apply their contributions, expertise and working method to synthesise new and complex ideas that yield a deeper knowledge of the research context in which they work;
d) have developed sufficient autonomy to set up, manage and lead innovative research teams and projects and scientific collaborations (both national and international) within their subject area, in multidisciplinary contexts and, where appropriate, with a substantial element of knowledge transfer;
e) have demonstrated that they are able to carry out their research activity in a socially responsible manner and with scientific integrity;
f) have demonstrated, within their specific scientific context, that they are able to make cultural, social or technological advances and promote innovation in all areas within a knowledge-based society;
g) have demonstrated that they are able to participate in scientific discussions at the international level in their field of expertise and disseminate the results of their research activity to audiences of all kinds.

Number of places

30

Duration of studies and dedication regime

Duration
The maximum period of study for full-time doctoral studies is four years, counted from the date of first enrolment in the relevant programme until the date on which the doctoral thesis is deposited. The academic committee of the doctoral programme may authorise a doctoral candidate to pursue doctoral studies on a part-time basis. In this case, the maximum period of study is seven years from the date of first enrolment in the programme until the date on which the doctoral thesis is deposited. To calculate these periods, the date of deposit is considered to be the date on which the thesis is made publicly available for review.

If a doctoral candidate has a degree of disability equal to or greater than 33%, the maximum period of study is six years for full-time students and nine years for part-time students.

For full-time doctoral candidates, the minimum period of study is two years, counted from the date of an applicant's admission to the programme until the date on which the doctoral thesis is deposited; for part-time doctoral candidates it is four years.

When there are justified grounds for doing so, and the thesis supervisor and academic tutor have given their authorisation, doctoral candidates may request that the academic committee of their doctoral programme exempt them from the requirement to complete this minimum period of study.

Temporary disability leave and leave for the birth of a child, adoption or fostering for the purposes of adoption, temporary foster care, risk during pregnancy or infant feeding, gender violence and any other situation provided for in current regulations do not count towards these periods. Students who find themselves in any of these circumstances must notify the academic committee of the doctoral programme, which must inform the Doctoral School.

Doctoral candidates may request periods of temporary withdrawal from the programme for up to a total of two years. Requests must be justified and addressed to the academic committee responsible for the programme, which will decide whether or not to grant the candidate's request.

Extension of studies
If a doctoral candidate has not applied to deposit their thesis before the expiry of the deadlines specified in the previous section, the academic committee of the doctoral programme may, at the request of the doctoral candidate, authorise an extension of this deadline of one year under the conditions specified for the doctoral programme in question.

Dismissal from the doctoral programme
A doctoral candidate may be dismissed from a doctoral programme for the following reasons:

  • The doctoral candidate submitting a justified application to withdraw from the programme.
  • The doctoral candidate not having completed their annual enrolment or applied for a temporary interruption.
  • The doctoral candidate not having formalised annual enrolment on the day after the end of the authorisation to temporarily interrupt or withdraw from the programme.
  • The doctoral candidate receiving a negative reassessment after the deadline set by the academic committee of the doctoral programme to remedy the deficiencies that led to a previous negative assessment.
  • The doctoral candidate having been the subject of disciplinary proceedings leading to their suspension or permanent exclusion from the UPC.
  • A refusal to authorise the extensions applied for, in accordance with the provisions of Section 3.3 of these regulations.
  • The doctoral candidate not having submitted the research plan in the period established in Section 8.2 of these regulations.
  • The maximum period of study for the doctoral degree having ended, in accordance with the provisions of Section 3.4 of these regulations.

Dismissal from the programme means that the doctoral candidate cannot continue studying at the UPC and that their academic record will be closed. This notwithstanding, they may apply to the academic committee of the programme for readmission, and the committee must reevaluate the candidate in accordance with the criteria established in the regulations.

A doctoral candidate who has been dismissed due to having exceeded the time limit for completing doctoral studies or due to an unsatisfactory assessment may not be Academic Regulations for Doctoral Studies Universitat Politècnica de Catalunya Page 17 of 33 admitted to the same doctoral programme until at least two years have elapsed from the date of dismissal, as provided for in sections 3.4 and 9.2 of these regulations.

Legal framework

Organization

COORDINATOR:
ACADEMIC COMMISSION OF THE PROGRAM:
STRUCTURAL UNITS:
  • Institute of Photonic Sciences (PROMOTORA)
SPECIFIC URL OF THE DOCTORAL PROGRAM:
http://phd.icfo.eu/

CONTACT:

Natalia García Tusquellas
The Institute of Photonic Sciences (ICFO)
Av. Carl Friedrich Gauss, 3
08860 Castelldefels

Tel: (+34) 93 554 22 10
E-mail: academicaffairs@icfo.eu


Agreements with other institutions

The ICFO has collaboration agreements in effect with a significant number of companies, including Leica Microsystems, Corning, Nikon-Izasa Grupo Sorigué, Accelerate Diagnostics, S.L., Fyla All-Fiber Ultrafast Lasers and GRAPHENEA. The Institute also participates in networks of excellence (Euro-BioImaging, Laserlab Europe, Corbel, etc.) and coordinates various Graphene Flagship and Quantum Flagship projects under the EU's Horizon 2020 Programme.

Access, admission and registration

Access profile

The doctoral programme in Photonics is designed for students with outstanding academic records at the international level who wish to complete a doctoral project in a field related to photonics.

With respect to entrance qualifications, it should be noted that photonics is a very broad discipline and that the ICFO is made up of a number of research groups that work in the various branches of the photonic sciences. Accordingly, the doctoral programme in Photonics is open to applicants with a wide range of qualifications, including degrees in physics; electronic, electrical, materials and telecommunications engineering; mathematics, chemistry, biology, bioengineering and biophysics.

As for language skills, the ICFO is a research institute with a strongly international character and English is the language used for everyday communication. Students admitted to the doctoral programme in Photonics must therefore have a high level of written and spoken English.

As for career goals, the doctoral programme in Photonics admits both students who wish to pursue academic careers and those aiming to become future leaders in knowledge and technology transfer or R&D in the business environment.

When it comes to personal characteristics, we are looking for students with high potential, motivation and the drive to carry out a project of excellence at the highest international level.

Access requirements

As a rule, applicants must hold a Spanish bachelor's degree or equivalent and a Spanish master's degree or equivalent, provided they have completed a minimum of 300 ECTS credits on the two degrees (Royal Decree 43/2015, of 2 February).

Applicants who meet one or more of the following conditions are also eligible for admission:

a) Holders of official Spanish degrees or equivalent Spanish qualifications, provided they have passed 300 ECTS credits in total and they can prove they have reached Level 3 in the Spanish Qualifications Framework for Higher Education.
b) Holders of degrees awarded in foreign education systems in the European Higher Education Area (EHEA), which do not require homologation, who can prove that they have reached Level 7 in the European Qualifications Framework, provided the degree makes the holder eligible for admission to doctoral studies in the country in which it was awarded.
c) Holders of degrees awarded in a country that does not belong to the EHEA, which do not require homologation, on the condition that the University is able to verify that the degree is of a level equivalent to that of official university master's degrees in Spain and that it makes the holder eligible for admission to doctoral studies in the country in which it was awarded.
d) Holders of another doctoral degree.
e) Holders of an official university qualification who, having been awarded a post as a trainee in the entrance examination for specialised medical training, have successfully completed at least two years of training leading to an official degree in a health sciences specialisation.

Note 1: Regulations for access to doctoral studies for individuals with degrees in bachelor's, engineering, or architecture under the system prior to the implementation of the EHEA (CG 47/02 2014).

Note 2: Agreement number 64/2014 of the Governing Council approving the procedure and criteria for assessing the academic requirements for admission to doctoral studies with non-homologated foreign degrees (CG 25/03 2014).

Legal framework

Admission criteria and merits assessment

Applications for admission to the doctoral programme in Photonics must be submitted through the website http://jobs.icfo.eu/, to which interested students are directed. Detailed information on specific vacancies available for doctoral students at any given time in each of the ICFO's research groups is published on this web page.

The following admission requirements are assessed on a yes/no basis and must be met to undertake the selection process:

• High level of English.
• High level of academic performance (GPA).
• Motivation to pursue doctoral studies in one of the fields of the doctoral programme.

In the first stage of the selection process, carried out by the admission body for the Photonics programme, requirements are assessed based on documents submitted in the application process, which are standardised to ensure that the assessment process is fair and unbiased. Accepted applications are assessed based on the following criteria, which carry equal weight:

• Previous research and cross-cutting experience (25%).

• Academic excellence and other achievements (25%).
• Statement of research interests (25%).
• Quality of references (25%).

In the second stage of the selection process, carried out by a selection committee appointed specifically for the call, assessment is based on the written proposals submitted by applicants (if applicable), their performance in an interview, and their answers to questions from the selection committee. The following criteria are considered and carry equal weight:

• Presentation of the research project (33%).
• Motivation to pursue doctoral studies in the chosen field and scientific interests (33%).
• Competencies and skills with respect to communication, independence, initiative and teamwork (33%).

Each of these points is assessed by assigning a score from 0 to 5 based on standardised scales. These scores are then combined (with equal weighting) to obtain the final result, which will determine the ranking of applicants.

Finally, measures are taken to ensure that the principles of transparency, efficiency and international compatibility set out in the European Charter for Researchers and the European Code of Conduct for the Recruitment of Researchers are followed throughout the admission process for the doctoral programme in Photonics. The process will also be free of any discrimination based on gender or nationality.

Training complements

Students who hold one of the following UPC master’s degrees, which are linked to the doctoral programme, will not be required to complete bridging courses: Erasmus Mundus master's degree in Photonics; master's degree in Photonics Engineering, Nanophotonics and Biophotonics; master's degree in Engineering Physics; and master's degree in Quantum Science and Technology.

Neither will students who have completed a master's degree in photonics or physics from another university be required to complete bridging courses.

In the case of students who have completed a master's degree in another field – such as a master's degree in biomedical sciences or a multidisciplinary master's degree in experimental sciences – the applicant’s academic record and the project they propose to work on will be assessed, and the academic committee will determine on a case-by-case basis whether specific bridging courses must be completed. If the academic committee so determines, these students will be required to take one of the following subjects as a bridging course:

• Introduction to Photonics. Optics and Lasers (5 ECTS credits), from the master’s degree in Photonics
• Applied Photonics (5 ECTS credits), from the master's degree in Enabling Technologies for the Food and Bioprocessing Industry.

Enrolment period for new doctoral students

Enrolment is open year round, subject to the calendar established by the Doctoral School.

More information at the registration section for new doctoral students

Enrolment period

In September.

More information at the general registration section

Monitoring and evaluation of the doctoral student

Formation activities

The doctoral programme in Photonics does not specify any minimum requirements with respect to number of papers published, conferences attended, or other activities. However, the academic committee for the programme will seek to ensure that each thesis meets the highest international standards before it is accepted for oral defence.

The training activities that make up the programme (including details of their duration and whether they are compulsory or optional) are listed below.

Mobility, 3 months (optional)
Preparation and initial defence of research plan, 50 hours (compulsory)
Training in information skills, 1.5 hours (optional)
Research Methodology, 12 hours (optional)
Innovation and Creativity, 8 hours (optional)
Language and Communication Skills, 18 hours (optional)
Scientific seminars, 25 hours/year (optional)
ICONS seminars, 40 hours/year (optional)
Coffee sessions with prominent researchers, 2 hours/year (optional)
Programme-specific workshops, 1 day/year (optional)
Publications, 50 hours (compulsory)
PhD lectures, 65 hours/year (optional)
Outreach activities, 18 hours (optional)
Training in technical skills, 5 hours for each technique (optional)
Effective Oral Presentations, 10 hours (optional)
ICFO-ESADE: From Science to Business, 24 hours (optional)
Introduction to Patent Engineering and Management, 7.5 hours (optional)
Language courses, 40 hours (Spanish, Catalan and English; optional)
Research Integrity, 3 hours (compulsory)
Career Development, 10 hours (optional)
Resilience and Well-Being, 6 hours (optional)
Essential Transferable Skills for Early Career Researchers, 12 hours (optional).

Procedure for assignment of tutor and thesis director

The academic committee of the doctoral programme assigns a thesis supervisor to each doctoral candidate when they are admitted or enrol for the first time, taking account of the thesis supervision commitment referred to in the admission decision.

The thesis supervisor will ensure that training activities carried out by the doctoral candidate are coherent and suitable, and that the topic of the candidate’s doctoral thesis will have an impact and make a novel contribution to knowledge in the relevant field. The thesis supervisor will also guide the doctoral candidate in planning the thesis and, if necessary, tailoring it to any other projects or activities undertaken. The thesis supervisor will generally be a UPC professor or researcher who holds a doctoral degree and has documented research experience. This includes PhD-holding staff at associated schools (as determined by the Governing Council) and UPC-affiliated research institutes (in accordance with corresponding collaboration and affiliation agreements). When thesis supervisors are UPC staff members, they also act as the doctoral candidate’s tutor.

PhD holders who do not meet these criteria (as a result of their contractual relationship or the nature of the institution to which they are attached) must be approved by the UPC Doctoral School's Standing Committee in order to participate in a doctoral programme as researchers with documented research experience.

The academic committee of the doctoral programme may approve the appointment of a PhD-holding expert who is not a UPC staff member as a candidate’s thesis supervisor. In such cases, the prior authorisation of the UPC Doctoral School's Standing Committee is required. A UPC staff member who holds a doctoral degree and has documented research experience must also be proposed to act as a co-supervisor, or as the doctoral candidate’s tutor if one has not been assigned.

A thesis supervisor may step down from this role if there are justified reasons (recognised as valid by the committee) for doing so. If this occurs, the academic committee of the doctoral programme will assign the doctoral candidate a new thesis supervisor.

Provided there are justified reasons for doing so, and after hearing any relevant input from the doctoral candidate, the academic committee of the doctoral programme may assign a new thesis supervisor at any time during the period of doctoral study.

If there are academic reasons for doing so (an interdisciplinary topic, joint or international programmes, etc.) and the academic committee of the programme gives its approval, an additional thesis supervisor may be assigned. Supervisors and co-supervisors have the same responsibilities and academic recognition.

The maximum number of supervisors of a doctoral thesis is two: a supervisor and a co-supervisor.

For theses carried out under a cotutelle agreement or as part of an Industrial Doctorate, if necessary and if the agreement foresees it this maximum number of supervisors may not apply. This notwithstanding, the maximum number of supervisors belonging to the UPC is two.

More information at the PhD theses section

Permanence

The maximum period of study for full-time doctoral studies is four years, counted from the date of first enrolment in the relevant programme until the date on which the doctoral thesis is deposited. The academic committee of the doctoral programme may authorise a doctoral candidate to pursue doctoral studies on a part-time basis. In this case, the maximum period of study is seven years from the date of first enrolment in the programme until the date on which the doctoral thesis is deposited. To calculate these periods, the date of deposit is considered to be the date on which the thesis is made publicly available for review.

If a doctoral candidate has a degree of disability equal to or greater than 33%, the maximum period of study is six years for full-time students and nine years for part-time students.

If a doctoral candidate has not applied to deposit their thesis before the expiry of the deadlines specified in the previous section, the academic committee of the doctoral programme may, at the request of the doctoral candidate, authorise an extension of this deadline of one year under the conditions specified for the doctoral programme in question.

Dismissal from the doctoral programme
A doctoral candidate may be dismissed from a doctoral programme for the following reasons:

  • The doctoral candidate submitting a justified application to withdraw from the programme.
  • The doctoral candidate not having completed their annual enrolment or applied for a temporary interruption.
  • The doctoral candidate not having formalised annual enrolment on the day after the end of the authorisation to temporarily interrupt or withdraw from the programme.
  • The doctoral candidate receiving a negative reassessment after the deadline set by the academic committee of the doctoral programme to remedy the deficiencies that led to a previous negative assessment.
  • The doctoral candidate having been the subject of disciplinary proceedings leading to their suspension or permanent exclusion from the UPC.
  • A refusal to authorise the extensions applied for, in accordance with the provisions of Section 3.3 of these regulations.
  • The doctoral candidate not having submitted the research plan in the period established in Section 8.2 of these regulations.
  • The maximum period of study for the doctoral degree having ended, in accordance with the provisions of Section 3.4 of these regulations.

Dismissal from the programme means that the doctoral candidate cannot continue studying at the UPC and that their academic record will be closed. This notwithstanding, they may apply to the academic committee of the programme for readmission, and the committee must reevaluate the candidate in accordance with the criteria established in the regulations.

A doctoral candidate who has been dismissed due to having exceeded the time limit for completing doctoral studies or due to an unsatisfactory assessment may not be Academic Regulations for Doctoral Studies Universitat Politècnica de Catalunya Page 17 of 33 admitted to the same doctoral programme until at least two years have elapsed from the date of dismissal, as provided for in sections 3.4 and 9.2 of these regulations.

Legal framework

Learning resources

In addition to the support units and services available at the UPC, the ICFO administration team is made up of staff with a high level of specialisation in various fields who provide specific and accessible assistance to students of the doctoral programme in Photonics. Specifically, the ICFO offers the following services and facilities:

• Human Resources and Education Unit: academic and hiring procedures, permits for foreign nationals, accommodation-related matters, predoctoral grants for doctoral studies, and mobility grants for doctoral students.
• Knowledge and Technology Transfer Unit: https://www.icfo.eu/lang/industry
• ICFO Projects Unit: responsible for seeking funding opportunities, advising researchers on preparation of proposals, and processing applications.

Doctoral students in the Photonics programme also have access to the NanoFabrication Lab, the Super-Resolution Light Microscopy and Nanoscopy Research Facility, the Advanced Engineering Lab, the Biology Lab, the Chemistry Lab and the Post-Processing Lab: https://www.icfo.eu/lang/research/facilities

Doctoral Theses

List of authorized thesis for defense

  • ARRÉS CHILLÓN, JAVIER: Application to Sensing, Imaging, and Cooling of Ultra-Thin Metal Films and Derived Nanostructured Glass Surfaces
    Author: ARRÉS CHILLÓN, JAVIER
    Thesis file: (contact the Doctoral School to confirm you have a valid doctoral degree and to get the link to the thesis)
    Programme: DOCTORAL DEGREE IN PHOTONICS
    Department: Institute of Photonic Sciences (ICFO)
    Mode: Normal
    Deposit date: 04/12/2025
    Reading date: 22/01/2026
    Reading time: 15:00
    Reading place: ICFO Auditorium
    Thesis director: PRUNERI, VALERIO
    Thesis abstract: The continuous evolution of optoelectronic systems responds to the demand for higher efficiency, speed, and sensitivity. A key strategy is to modify material dimensions at the nanoscale, which alters their optical, electrical, and thermal properties and enables new functionalities.A prominent example is ultra-thin metal films (UTMFs), with thicknesses below 10 nm, which exhibit properties different from thicker metal layers. This thesis explores the use of gold (Au) UTMFs deposited on copper oxide (CuO) seed layers, fabricated with industrial techniques such as physical vapor deposition (PVD). These ultra-thin films enable continuous and ultrasmooth surfaces, as well as tunable properties through optical or electrical processes.The potential of these UTMFs in electrochemical sensors based on self-assembled monolayers (SAMs) is demonstrated. The results show that thinner films respond more rapidly to SAM formation, and that biotin functionalization enables the detection of streptavidin through measurable resistance changes.The optical interaction between UTMFs and fluorophores is also investigated, focusing on fluorescence quenching caused by non-radiative energy transfer. Experiments reveal the dependence on film thickness and fluorophore–metal separation, confirming that these films can enhance the signal-to-noise ratio in fluorescence imaging of stained bacteria.Finally, glass surfaces are nanostructured with nanopillars (NPs) generated via thermally dewetted UTMF masks and subsequent etching. These surfaces exhibit unique optical properties: anti-reflective coatings in the visible range and enhanced infrared emissivity. Moreover, they are combined with thin polymer coatings to preserve visible transparency while improving the efficiency of passive radiative cooling (PRC). Results confirm that nanostructured glass surfaces dissipate more heat than flat ones, opening opportunities in solar panels, displays, and windows.This thesis therefore demonstrates the potential of Au UTMFs and nanostructured glass surfaces for the development of chemical sensors, advanced optical microscopy techniques, and radiative cooling applications.
  • CHIEN, YING-HAO: Revealing Ultrafast Dynamics in Hexagonal Boron Nitride with Attosecond X-ray Absorption Fine-structure Spectroscopy
    Author: CHIEN, YING-HAO
    Thesis file: (contact the Doctoral School to confirm you have a valid doctoral degree and to get the link to the thesis)
    Programme: DOCTORAL DEGREE IN PHOTONICS
    Department: Institute of Photonic Sciences (ICFO)
    Mode: Normal
    Deposit date: 16/10/2025
    Reading date: 27/01/2026
    Reading time: 10:00
    Reading place: ICFO Auditorium
    Thesis director: BIEGERT, JENS
    Thesis abstract: Since the invention of the integrated circuit (IC) in the 1950s, modern civilization has been built upon its foundation. As ICs continue to scale down and operate at higher speeds, managing heat dissipation and energy transfer process is critical to overcoming performance limitations and enabling the development of next-generation ICs. In classical models, electrons and phonons are treated as independent systems to simplify calculations. This approximation successfully describes electronic band structures, charge transport, and optical responses in many materials under equilibrium conditions. However, it neglects the critical role of electron-phonon coupling, a fundamental many-body interaction that governs non-equilibrium energy exchange between electronic and lattice degrees of freedom. Recent advances in attosecond X-ray absorption fine structure (atto-XAFS) spectroscopy offer an unprecedented opportunity to observe electron-phonon coupling dynamics with both attosecond temporal and element-specific resolution. Hexagonal boron nitride (hBN), a widely studied prototypical material with diverse applications, still presents unresolved questions regarding its ultrafast dynamics. In this work, we investigate the coupled electron and phonon dynamics in bulk hBN using atto-XAFS. By employing different excitation conditions and exploiting different temporal resolutions, we disentangle the respective contributions of electrons and phonons to the transient response, demonstrating the unique capability of atto-XAFS to probe many-body dynamics in real-time. To enable further studies of novel materials, we upgraded our titanium-doped sapphire (Ti:sapphire) chirped pulse amplification (CPA) laser system, integrated a new commercial TOPAS optical parametric amplifier, designed a novel microfluidics gas target combined with a piezo pulse valve system aimed at reducing helium consumption for high harmonic generation (HHG), implemented a cryogenic sample mount for temperature-dependent measurements, and replaced the diffraction grating in the soft X-ray spectrograph with high diffraction efficiency and high resolving power reflection zone plates. We demonstrate the enhanced performance of the upgraded system for future advanced atto-XAFS experiments.

Last update: 01/01/2026 05:46:09.

List of lodged theses

NO RESULTS: there are no theses in this list.

Last update: 01/01/2026 05:31:20.

List of defended theses by year

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NO RESULTS: there are no theses in this list.

Last update: 01/01/2026 06:00:09.

Theses related publications

Encara no hi ha publicacions associades a tesis d'aquest programa.

Aún no hay publicaciones asociadas a tesis de este programa.

There are no publications associated with theses from this program yet.

Research projects

START DATEEND DATEACTIVITYFINANCING ENTITY
12/09/202330/06/2026Chips para arquitecturas avanzadas y sistemas fotónicosMIN DE ECONOMIA Y COMPETITIVIDAD
01/11/202231/10/2026Unite! University Network for Innovation, Technology and EngineeringEuropean Commission. Education Audiovisual and Culture Agency Executive Agency (Eacea)
08/06/202208/06/2022A device, a method, and a computer program, for detecting airborne particulate matter in aerosols
16/03/202216/03/2022Dispositivo de obtención de imágenes basado en láminas de luz con profundidad de campo aumentada
30/11/202130/11/2021Self-Referenced Sensor
15/09/202115/09/2021Light sheet-based imaging device with extended depth of field
16/02/202116/02/2021Dispositivo fotovoltaico con un conjunto de fibras para seguimiento del sol
01/01/201930/09/2022NUEVOS EFECTOS EN PLATAFORMAS DE GUIAS DE ONDA ANISOTROPASAgencia Estatal de Investigación

Teaching staff and research groups

Research projects

START DATEEND DATEACTIVITYFINANCING ENTITY
12/09/202330/06/2026Chips para arquitecturas avanzadas y sistemas fotónicosMIN DE ECONOMIA Y COMPETITIVIDAD
01/11/202231/10/2026Unite! University Network for Innovation, Technology and EngineeringEuropean Commission. Education Audiovisual and Culture Agency Executive Agency (Eacea)
08/06/202208/06/2022A device, a method, and a computer program, for detecting airborne particulate matter in aerosols
16/03/202216/03/2022Dispositivo de obtención de imágenes basado en láminas de luz con profundidad de campo aumentada
30/11/202130/11/2021Self-Referenced Sensor
15/09/202115/09/2021Light sheet-based imaging device with extended depth of field
16/02/202116/02/2021Dispositivo fotovoltaico con un conjunto de fibras para seguimiento del sol
01/01/201930/09/2022NUEVOS EFECTOS EN PLATAFORMAS DE GUIAS DE ONDA ANISOTROPASAgencia Estatal de Investigación

Quality

The Validation, Monitoring, Modification and Accreditation Framework (VSMA Framework) for official degrees ties the quality assurance processes (validation, monitoring, modification and accreditation) carried out over the lifetime of a course to two objectives—the goal of establishing coherent links between these processes, and that of achieving greater efficiency in their management—all with the overarching aim of improving programmes.

Validation

Monitoring

Accreditation

Modification

Registry of Universities, Centers and Degrees (RUCT)

Indicators