Technical University of Denmark (DTU)

PhD position in ultrafast Spectroscopy of Two-Dimensional Metal Halide Perovskites using Hollow-Core Fibre Laser based Light Sources

Technical University of Denmark (DTU)

2800 Kgs. Lyngby, Denmark

In response to a recently funded research project (ULTRA-LOWD) supported by the Independent Research Fund Denmark, we are pleased to announce a PhD position in the field of experimental ultrafast terahertz science and technology within DTU Fotonik at the Technical University of Denmark. The position is fully-funded for a period of three years.

Using a newly developed laser source that utilises hollow-core fibre technology and delivers intense, broadband THz radiation at unprecedented repetition rates (up to several MHz, with multi-kV/cm field strengths), this project will:

  • Develop a complementary beam-line delivering wavelength tunable pulses covering the visible spectral region by harnessing nonlinear interactions in gas-filled fibre;
  • Use these as-generated visible pulses in a transient absorption setup to both photo-excite and probe the ultrafast electronic response of low-dimensional crystalline materials subject to strong THz excitation;
  • Explore the relationship between structural and electronic properties in two-dimensional (2D) semiconducting layered metal halide perovskites (MHPs).

This approach will allow us to unravel couplings between specific structural modes and relaxation pathways of hot charge-carriers, the role of excitons, and the formation and coupling of exciton complexes with the crystal lattice – all of which are not well understood in 2D MHPs. This fundamental understanding will have important implications for the development of future energy-efficient electronic devices to meet the challenges of a sustainable green society.

This is an open and unrestricted call. The successful candidate will be chosen based on their merits and suitability, but will be expected to have:
  • An excellent record of academic performance from a recognised institution;
  • A strong grounding in the foundations of nonlinear optics and solid-state physics;
  • A proven interest in ultrafast spectroscopy;
  • The ability to think laterally, propose solutions to complex problems and analyse experimental data within the framework of theoretical models;
  • A good command of written and verbal English.
  • A two-year master’s degree (120 ECTS points) or a similar degree with an academic level equivalent to a two-year master’s degree.

It would be a beneficial if the candidate has:
  • Hands-on experience working in an ultrafast optics laboratory;
  • Competency in Python, Julia, C++ etc for data analysis, modelling and visualisation.

We will offer you:
  • A collaborative, engaging and stimulating working environment within which to rigorously pursue your scientific interests;
  • Access to state-of-the-art laboratories equipped with leading-edge ultrafast laser infrastructure enabling a broad range of spectroscopic experiments;
  • The opportunity to travel internationally to present your latest results at conferences and workshops, and perform research work at collaborating universities;
  • A strong ethos of work-life-balance;
  • A competitive salary.

Approval and Enrolment
The scholarship for the PhD degree is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see the DTU PhD Guide.

DTU offers
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and appointment terms
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 3 years.

You can read more about career paths at DTU here.

Further information
For further information and informal enquiries, please contact Edmund Kelleher, or visit

Please submit your online application no later than 28 February 2020 (23:59 local time).

Apply online at

Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link “Apply online”, fill out the online application form, and attach all your materials in English in one PDF file. The file must include:
  • A letter motivating the application (cover letter)
  • Curriculum vitae
  • Grade transcripts and BSc/MSc diploma
  • Excel sheet with translation of grades to the Danish grading system (see guidelines and Excel spreadsheet here)

Candidates may apply prior to ob­tai­ning their master’s degree but cannot begin before having received it.

Applications and enclosures received after the deadline will not be considered.

All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply.

DTU Fotonik has 220 employees and is one of the largest research centers in the world focusing entirely on photonics. Research is performed within the span from fundamental science to applications, emphasizing the areas of nanophotonics, lasers, quantum photonics, optical sensors, LEDs, photovoltaics, ultra-high speed optical transmission systems, and bio-photonics.

Technology for people
DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear vision to develop and create value using science and engineering to benefit society. That vision lives on today. DTU has 11,500 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. Our main campus is in Kgs. Lyngby north of Copenhagen and we have campuses in Roskilde and Ballerup and in Sisimiut in Greenland.

Please apply via recruiter’s website.