30 October 2026

Low-Loss Photonic Integrated Circuits for Quantum Photonics

photons

Bachelor/Masters Project Description

At NQCP we are building a quantum computer in which single photons carry quantum information in silicon microchips. The performance of such circuits critically depends on one number: optical loss, because every lost photon is lost information. This project develops our next-generation photonic platform, which combines silicon with barium titanate (BaTiO3, BTO), one of the strongest electro-optic materials known, grown in Copenhagen on full-size 300mm silicon wafers, towards low-loss, compact photonic integrated circuits (PICs) for quantum photonics. Depending on your interests and level, the project can focus on developing a hardmask process for silicon, on reproducible low-loss etching, or on BTO bonding and next-generation PICs, and we define the final scope together. It can involve theory/simulation aspects but will be primarily experimental in the cleanroom, optical lab or a combination. You will characterize the devices both with our wafer-scale autoprober, giving fast and reproducible data, and in cryostats supporting single-photon devices based on silicon T-centres.

Benefits for the Future Quantum Scientist 

  • Hands-on experience: Gain practical skills in cutting-edge nanofabrication and in automated optical and cryogenic measurements, used heavily in academia and industry.
  • Deep understanding: Learn how materials, fabrication, and design together determine the performance of photonic circuits, from a single waveguide to a full wafer.
  • Quantum contribution: Be part of the exciting world of quantum computing by building the essential building blocks!

Expected Qualifications:

Bachelor's or Master's student in Physics, Nanoscience, or related.

Contacts:

Marcus Albrechtsen, Asst. Prof., m.albrechtsen@nbi.ku.dk, - Team Quantum Photonics

Gitte Michelsen, Student Coordinator, gittem@nbi.ku.dk 

How to Apply:

Please apply by email to Marcus Albrechtsen. Your application must include:

  • CV
  • Letter of motivation
  • Transcript of grades

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