Postdoc in Fibre-based Quantum Key Distribution

Friday 09 Oct 20

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Apply no later than 8 November 2020
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Quantum key distribution (QKD), i.e. distribution of secret keys exploiting the laws of quantum mechanics, is the only way to secure sensitive information via a physical channel. Although big steps in QKD have been taken over the last 20 years, and a few companies are commercializing QKD systems, major challenges still exist. For instance, the information rates and compatibility with existing communication systems must be improved and new concepts must be developed to ensure better scalability of implemented schemes.

This postdoc project will investigate new and efficient quantum key distribution protocols exploring high-dimensional fibre-based encoding scheme. In addition, this project will aim at full-fledged co-propagation of classical and quantum light within the same optical link and application of such systems in a field-trial link. 

The Postdoc project will carried out in the High-Speed Optical Communications group (HSOC) at the Technical University of Denmark (DTU Fotonik). The HSOC group is at the very forefront of international research in high-dimensional quantum communications technology and holds a number of world records within silicon photonics and ultra-high speed optical communication. The group is at a high international level, encourages collaborative work, and offers an informal working environment. The project will have access to on-site and state-of-the-art experimental facilities. 

Responsibilities and tasks
This Postdoc position will target experimental and theoretical investigation of the topics below:

  • Development of a real-time high dimensional quantum key distribution system based on high-dimensional encoding at telecom wavelength.
  • Co-propagation of classical and quantum light within the same optical fibre.
  • Field trial tests of QKD systems both in Denmark and in Italy. In particular, the project will target a field-trial demonstration of a QKD system at the University of L’Aquila, in collaboration with Prof. Antonio Mecozzi and Assoc. Prof. Cristian Antonelli.

The exact research activities will be continuously adapted to ensure high relevance and impact.

Candidates should have a PhD degree or equivalent. 

The successful candidate is expected to have experience and expertise in one or more of the following subjects:     

  • Experience in fibre-based quantum key distribution.
  • Experimental and theoretical knowledge of quantum communication
  • Experience with high-speed electronics and FPGA coding
  • Experience with classical optical communication systems
  • Experience in high-dimensional fibre based quantum communication
  • Self-motivation in scientific research.
  • Good communication skills in English, both written and spoken.

We offer
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 terms of employment 
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 12 months. 

The place of work is DTU Fotonik, Ørsteds Plads, Building 343, DK-2800 Kgs. Lyngby, Denmark, but research stays at l’Aquila are expected. 

You can read more about career paths at DTU here.  

Further information
Further information may be obtained from Assist. Professor Davide Bacco, e-mail:

You can read more about DTU Fotonik at

Application procedure 
Please submit your online application no later than 8 November 2020 (local time). 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:

  • Application (cover letter)
  • CV
  • Diploma (MSc/PhD)
  • List of publications

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

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

DTU Fotonik has 210 employees with competences in optics and is one of the largest centers in the world based solely on research in photonics. Research is performed within quantum photonics, optical sensors, lasers, LEDs, photovoltaics, ultra-high speed optical transmission systems, bio-photonics, and nano-optics. 

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 12,000 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.