Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Focus Session: Quantum Nanophotonics in Solid State Systems I (joint session HL/TT)

TT 39.2: Hauptvortrag

Dienstag, 13. März 2018, 10:00–10:30, EW 201

On-chip integration of superconducting single photon detectors — •Wolfram Pernice — Universität Münster, Physikalisches Institut, Heisenbergstr. 11, 48149 Münster

Nanophotonic circuits employ waveguiding devices to route light across quasi-planar integrated optical chips in analogy to electrical wires in integrated electrical circuits. Using materials with high refractive index allows for confining light into sub-wavelength dimensions as efficient optical wires. Interaction with the environment is possible through near-field coupling to the evanescent tail of propagating optical modes, given that the measurable system is close to the waveguide surface. The interaction length can then be conveniently tailored by simply choosing a sufficiently long waveguide. This approach is particularly interesting for designing highly sensitive detectors which are able to register individual photons. Because nanophotonic circuits are well-suited for the study of single photon effects on chip, such detectors constitute a fundamental building block for emerging quantum photonic technologies. I will present recent progress on waveguide integrated single photon detectors, with a focus on superconducting nanowire single photon counters. Besides covering the basics of single photon threshold detection, advanced designs for multi-photon and coherent detection will be discussed. In combination with waveguide coupled single photon sources, such detectors are promising ingredients for fully integrated quantum circuits. The heterogeneous integration with nanophotonic circuits allows for implementing compact hybrid systems for non-classical optics in a chipscale framework.