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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster I

Q 23.46: Poster

Tuesday, March 12, 2024, 17:00–19:00, Tent B

Multiwavelength Characterization of Polarization Optics for Broadband Superconducting Detector Calibration — •Isabell Mischke, Timon Schapeler, and Tim Bartley — Institute for Photonic Quantum Systems, Department of Physics, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany

Intrinsically, superconducting detectors can detect a broad spectrum. But it remains an open question whether the detector behaves the same to one photon at a certain energy or two photons of half the energy. To investigate the difference in the behaviour, it is important to understand the operation of the detector for different wavelengths. Our aim is the multiwavelength characterization of superconducting nanowire single-photon detectors (SNSPDs), with respect to the polarization and wavelength dependence of the setup. This requires exploring the wavelength and polarization dependence of all components, to extract the intrinsic spectral response of the SNSPD alone. We present initial data towards this aim.

Keywords: SNSPD; Polarization Measurement; Polarization Dependency; Multiwavelength Characterization