PhD position in Quantum photonics

Project description
Quantum optics is going to play a large role in future computing, sensing, and secure communication. However, many demonstrations are laboratory-based, limiting the real-world applications and impact. Our objective is to realize a generic photonic integration platform (“optical chips”) for quantum optics, based on mature, foundry-based processes. Custom single-photon sources will be added as a back-end process. This platform will be robust, versatile and scalable, for feasible and credible transfer out of the laboratory. Thus, an actual quantum technology will be realized.

You will join the quantum nanophotonics group headed by Prof. Peter Lodahl (, which is focusing on the development of a solid-state platform for quantum optics based on semiconductor quantum dots and photonic integrated circuits. This project is a collaboration between the Niels Bohr Institute (NBI) at Copenhagen University and Aarhus University.

You will design and fabricate a gallium-arsenide-based single-photon source integrated on a silicon nitride photonic integrated circuit. NBI has developed state-of-the-art deterministic single-photon sources [1] using semiconductor quantum dots in photonic nanostructures [2]. This project is an effort towards embedding such sources into the ultra-low loss silicon nitride platform [3]. The fabrication of the chips will be carried out in our state-of-the-art laboratories for nanofabrication Quantech ( Furthermore, you will work in close collaboration with our partners in Aarhus to test the integration with silicon nitride circuits.

[1] Arcari et al, “Near-Unity Coupling Efficiency of a Quantum Emitter to a Photonic Crystal Waveguide”, Phys. Rev. Lett. 113, 093603 (2014).

[2] Lodahl et al, “Interfacing single photons and single quantum dots with photonic nanostructures”, Rev. Mod. Phys. 87, 347 (2015).

[3] Wörhoff et al., “TriPleX: a versatile dielectric photonic platform”, Advanced Optical Technologies 4 (2015).

Employment date is November 1 2019 or as soon as possible thereafter.

The PhD student’s tasks will include:

  • Learn and understand solid-state quantum emitters and the fundamentals of quantum optics (MSc and PhD level courses are offered at NBI).
  • Acquire the fabrication skills required to build a single-photon source based on quantum dots in gallium arsenide (GaAs).
  • Learn the methods to perform hybrid integration of GaAs with silicon nitride in collaboration with our partners.
  • Characterize the single-photon sources in our optical laboratories.
  • Perform numerical simulations (finite difference time domain or finite elements) of our devices.

The PhD positions are for a 3-year period and the key tasks as a PhD student at Science are:

  • To manage and carry through your research project
  • Attend PhD courses
  • Write scientific articles and your PhD thesis
  • Teach and disseminate your research
  • To stay at an external research institution for a few months, preferably abroad
  • Work for the department

Qualifications and competences:

Applicants must have:

  • A Master’s degree in Applied Physics, Optical or Electrical Engineering, or similar, or about to get one.
  • Backround in optics, solid-state physics or optoelectronics, including experimental skills.
  • Basic knowledge of quantum physics and numerical methods for phsyics. 
  • Interest in doing nanofabrication (previous experience working in cleanrooms is a plus) and experimental work.
  • Ability to work independently and in collaboration with other scientists and researchers.

Terms of employment
The positions are covered by the Memorandum on Job Structure for Academic Staff.

Terms of appointment and payment accord to the agreement between the Ministry of Finance and The Danish Confederation of Professional Associations on Academics in the State.

The starting salary is currently at a minimum DKK 322,642 including annual supplement (+ pension up to DKK 55,172). Negotiation for salary supplement is possible.

Application Procedure
The application, in English, must be submitted electronically by clicking APPLY NOW below. Applicants are most welcome to apply for all three positions however please indicate clearly in the application/cover letter for which position(s) the application is aiming for.

Please include

  • Cover Letter, detailing your motivation and background for applying for the PhD project
  • CV
  • Diploma and transcripts of records (BSc and MSc)
  • Acceptance Letter for the relevant MSc Programme at SCIENCE, if any
  • Other information for consideration, e.g. list of publications (if any),
  • Full contact details (Name, address, telephone & email) of 1-3 professional referees

The University wishes our staff to reflect the diversity of society and thus welcomes applications from all qualified candidates regardless of personal background.

The deadline for applications is August 30 2019, GMT +2. Applications received later than this date will not be considered.

After the expiry of the deadline for applications, the authorized recruitment manager selects applicants for assessment on the advice of the Interview Committee. Afterwards an assessment committee will be appointed to evaluate the selected applications. The applicants will be notified of the composition of the committee and the final selection of a successful candidate will be made by the Head of Department, based on the recommendations of the assessment committee and the interview committee.

The main criterion for selection will be the research potential of the applicant and the above mentioned skills. The successful candidate will then be requested to formally apply for enrolment as a PhD student at the PhD school of Science.

You can read about the recruitment process at

General information about PhD programmes at SCIENCE is available at


Part of the International Alliance of Research Universities (IARU), and among Europe’s top-ranking universities, the University of Copenhagen promotes research and teaching of the highest international standard. Rich in tradition and modern in outlook, the University gives students and staff the opportunity to cultivate their talent in an ambitious and informal environment. An effective organisation – with good working conditions and a collaborative work culture – creates the ideal framework for a successful academic career.


Application deadline: 30-08-2019
Employment start: 01-11-2019
Working hours: Full time
Department/Location: Niels Bohr Institute

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