High-Efficiency Nanophotonic Systems for Quantum Precision Experiments

Braunschweig University of Technology
November 17, 2022
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The Institute for semiconductor technology focuses on basic and applied research in the fields of optoelectronics based on III-V semiconductors, nanophotonics, and quantum technologies. The institute is member of the cluster of excellence QuantumFrontiers and the Quantum Valley Lower Saxony where photonic technologies for next generation of quantum precision experiments, such as atom chips, ultra-stable laser cavities, and quantum computers are developed. The possibility of doing a PhD is possible within the division Optical Quantum Metrology.

The Institute for Semiconductor Technology (IHT) seeks to fill a position for a

Doctoral Researcher (m/f/d)

in the research topic

High-Efficiency Nanophotonic Systems for Quantum Precision Experiments

commencing immediately.

We offer a limited part-time doctoral position (EG 13 TV-L, 75%, 30 hours/week), (initially) limited for two years, with the possibility of an extension if appropriate.

Research topic Nanophotonics systems such as photonic integrated circuits and metasurfaces provide a fascinating platform to enable quantum precision experiments. For the experimental realization, typically dielectric materials such as silicon, silicon nitride, or III-V semiconductors are utilized. Optical losses in these systems set a crucial limitation on their applicability in optical quantum technologies. On the one hand, losses lead to decoherence. On the other hand, they set critical boundaries to optical parameters like the reflectivity of cavity meta-mirrors. With these devices, recently, a finesse of >11.000 has been demonstrated. To enable an application in ultra-stable laser cavities, we want to push the finesse towards 100.000. Aim of this project will be the quantification of optical losses, e.g. roughness induced scattering, in photonic systems arising in the fabrication process. This covers numerical simulations as well as optical experiments and the development of strategies to mitigate these losses. The project will thus help elevate photonic elements' performance to the next level.

We offer

  • Remuneration based on the provisions of the Collective Agreement for the Public Sector of the Federal States (TV-L) at salary scale E13 — depending on the candidate's personal qualifications—includes a special annual payment per the collective agreement.
  • Participation in experimental and theoretical research within national and international networks of research institutes and industrial companies
  • Excellent equipment and infrastructure
  • Participation in international conferences and cross-sectional training programs
  • Your Profile

  • High motivation and a very good university degree in physics or related subjects (Master or equivalent)
  • Interest and aptitude for developing and performing laboratory work
  • We expect open communication and the ability to work in a team
  • Solid language skills in German and English would be desirable
  • Prior experience in one or more of the following areas:
  • Micro- and Nanophotonics
  • Optical Simulations (e.g. FEA, FDTD, RCWA), Matlab and/or Python
  • Optical experiments in the lab
  • Nanotechnology
  • Applications from people of all nationalities are welcome. The TU Braunschweig promotes professional gender equality. We particularly encourage female scientists to apply for the advertised position. Application costs cannot be reimbursed. Personal data will be stored for the purpose of the application process. Severely disabled applicants will be given preferential consideration in case of equal suitability. A proof is to be enclosed.

    Applications (incl. curriculum vitae) should be sent by mail to Prof. Dr. Stefanie Kroker by 17.11. 2022.

    Contact Prof. Dr. Stefanie Kroker Technische Universität, Institut für Halbleitertechnik, Hans-Sommer-Str. 66, 38106 Braunschweig. E-Mail: s.kroker@tu-braunschweig.de , Phone: (0) 531-391 65350

    from: 03.11.2022 valid until: 17.11.2022

    Photo credits on this page

    Kristina Rottig/TU Braunschweig

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