Postdoc on Silicon Photonic Chips for 2 um Optical Communications

DTU Fotonik
Monday 20 Nov 17

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Today’s communication infrastructure is facing serious scalability and energy consumption issues and it will be unsustainable in a not too distant future if there are no changes in energy consumption trends. So far, photonics has enabled transmission of vast quantities of information. The promising next step will be to use photonics for signal processing (i.e. signals controlled by photonics instead of electronics) – to achieve optical switching and routing of high-capacity data signals with ultra-low energy consumption.

The mid-Chip project will investigate the feasibility of ultra-high-speed (>1 Tbit/s) optical interconnects based on optical signal processing using mid-infrared (mid-IR) silicon photonic chips with significantly reduced energy consumption. The mid-IR spectral region is highly interesting in Si due to much lower nonlinear losses compared to conventional telecom wavelengths. The topic of mid-IR silicon photonics is quite novel, leaving ample opportunity for this postdoc project to beyond significantly the state-of-the-art in research in the field.

The Postdoc project will be carried out in the High Speed Optical Communications group (HSOC) in the Department of Photonic Engineering at the Technical University of Denmark. The HSOC group is at the very forefront of research in optical communication technology and holds a number of world records in ultra-high speed optical communication. There is access to state-of-the-art experimental facilities and cleanroom facilities. The group is highly international and encourages collaborative work and an informal working environment.

Responsibilities and tasks
This Postdoc position will be part of the mid-Chip project and will target experimental and theoretical investigation of the topics below:

  • Design and fabrication of silicon photonic devices optimized for 2 um wavelength region.
  • Explore new functionalities for optical signal processing at 2 um using silicon photonic devices.
  • Characterization and optimization of ultra-wide band optical nonlinear interaction in silicon photonic devices.
  • Demonstration and characterization of parametric amplification and wavelength conversion in silicon photonic devices with CW operation at 2 um.
  • Optical frequency comb generation or broadening at 2 um in silicon ring resonator or nano-waveguide.  

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:    

  • Silicon nanophotonic device design, fabrication and characterization.
  • Experienced in all-optical nonlinear signal processing, in particular familiar with third-order nonlinear effects in compact platforms, such as Kerr effect.
  • Optical communications.
  • Self-motivation in scientific research.
  • Good communication skills in English, both written and spoken.

The assessment of the applicants will be made by Senior Researcher Hao Hu, Associate Professor Michael Galili and Researcher Yunhong Ding.

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 an academic freedom tempered by responsibility.

Salary and appointment terms
The appointment will be based on the collective agreement with the Confederation of Professional Associations. The allowance will be agreed with the relevant union. The period of employment is 2 years.

The place of work is DTU Fotonik, Ørsteds Plads, Building 343, DK-2800 Kongens Lyngby, Denmark.

Further information
Further information may be obtained from Senior Researcher Hao Hu,  Associate Professor Michael Galili and Researcher Yunhong Ding. 

You can read more about DTU Fotonik on   

Please submit your online application no later than 20 December 2017 (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 in 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, race, disability, 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 optical sensors, lasers, LEDs, photovoltaics, ultra-high speed optical transmission systems, bio-photonics, nano-optics and quantum photonics.  

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 5,800 advance science and technology to create innovative solutions that meet the demands of society; and our 11,000 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government, and public agencies.