PhD scholarship in Gas-filled Hollow-Core Photonic Crystal Fibers for Sensing Applications and Ultrafast Non-linear Optics

DTU Fotonik
Wednesday 15 Feb 17

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A 3-year PhD position is available in the Fiber Sensors and Supercontinuum Group at DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark (DTU).  The PhD project is a part of the project ECOMETA: Emission Control: Methods and Technologies for Agriculture recently funded by the Innovation Fund Denmark. It combines the efforts of 12 multi-disciplinary academic and non-academic partners across Denmark to achieve a primary food production that is 1) economically sustainable under strict environmental regulation, 2) environmentally acceptable to society and 3) contributing to creation of new jobs and economic value in associated industries.
Project description
This PhD project is entitled “Gas-filled Hollow-Core Photonic Crystal Fibers for sensing applications and ultrafast non-linear optics”. The project is divided in two parts. The first part is directly linked to ECOMETA project and it involves the development of a fully integrated and compact sensing system based on Hollow-core Photonic Crystal Fibers (HC-PCF) suitable for sensing of ammonia and odor measurements in agriculture.  The novel compact laser-based gas sensor will be developed, with all optical elements, tunable laser and detectors, integrated on a single chip. Analogous to structural fiber sensors, photonic integration improves the sensitivity hundredfold, compared to discrete-optics gas sensors. The optical chip couples, through a telecom fiber, to a hollow-core fiber, having ion-beam milled gas inlet holes. This configuration allows for a long interaction length with the atmosphere, and is compact and robust. The use of commercial integration and fiber technologies enables technology transfer out of the lab. The design and the final developed system will target a < 0.1 ppm NH3 sensitivity.

Upon the successful completion of the first part, the candidate will then have the opportunity to get involved and work in the recent field of ultrafast non-linear optics based on gas-filled hollow-core fibers. Gases and partial plasmas offer the greatest transparency range of any nonlinear active media and hence enable the largest spectral extent for nonlinear experiments. In this part of the project, the candidate will both numerically and experimentally investigate the use of various Raman inactive noble gases inside novel antiresonant hollow-core fibers for mid-infrared (mid-IR) supercontinuum generation or light in the extreme vacuum-ultraviolet (VUV) region.  
Candidates are required to have a Master’s degree or a very good first degree in Physics, Engineering or Material Science, ideally with a track record within the areas of fiber modeling using COMSOL and Matlab, fibre optics and waveguides, nonlinear optics and laser physics. At the time of recruitment by the host organization, candidates must be in the first four years (full-time equivalent research experience) of their research careers, and have not been awarded a doctoral degree.
Researchers can be of any nationality. They are required to undertake transnational mobility (i.e. move from one country to another) when taking up their appointment. Nationality is therefore not a criterion. Rather the location of the researcher's residence or main activity during the 3 years prior to their recruitment is determining. At the time of recruitment by the host organisation, researchers must not have resided or carried out their main activity (work, studies, etc.) in the country of their host organisation for more than 12 months in the 3 years immediately before the reference date. Compulsory national service and/or short stays such as holidays are not taken into account.
The assessment of the applicants will be made by: Dr. Christos Markos and Professor Ole Bang.
Approval and Enrolment
The scholarships for the PhD degree are subject to academic approval, and the candidates will be enrolled in one of the general degree programmes of DTU. For information about the general requirements for enrolment and the general planning of the scholarship studies, please see the DTU PhD Guide.
Salary and appointment terms
The salary and appointment terms are consistent with the current rules for PhD degree students. The period of employment is 3 years.
Further information
Main PhD supervisor, Dr. Christos Markos, phone: +45 4525 6387, email:

Co-supervisor, Professor Ole Bang, phone: +45 4525 6373, email:

You can read more about Department of Photonics Engineering on

Please submit your online application no later than 31 March 2017. Applications must be submitted as one pdf file containing all materials to be given consideration. To apply, please open the link "Apply online," fill in 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.

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

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