Print Email Facebook Twitter Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer Title Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer Author Mukhtarova, Anna (Université Grenoble Alpes) Redaelli, Luca (Université Grenoble Alpes) Hazra, Dibyendu (Université Grenoble Alpes) Machhadani, Houssaine (Université Grenoble Alpes) Lequien, Stéphane (Université Grenoble Alpes) Hofheinz, Max (Université Grenoble Alpes) Thomassin, Jean Luc (Université Grenoble Alpes) Gustavo, Frederic (Université Grenoble Alpes) Zichi, J.R. (KTH Royal Institute of Technology) Zwiller, V.G. (TU Delft QN/Zwiller Lab; Université Grenoble Alpes; KTH Royal Institute of Technology; Kavli institute of nanoscience Delft) Monroy, Eva (Université Grenoble Alpes) Gerard, J.A. (Université Grenoble Alpes) Date 2018 Abstract Superconducting-nanowire single photon detectors (SNSPDs) are able to reach near-unity detection efficiency in the infrared spectral range. However, due to the intrinsic asymmetry of nanowires, SNSPDs are usually very sensitive to the polarization of the incident radiation, their responsivity being maximum for light polarized parallel to the nanowire length (transverse-electric (TE) polarization). Here, we report on the reduction of the polarization sensitivity obtained by capping NbN-based SNSPDs with a high-index SiNx dielectric layer, which reduces the permittivity mismatch between the NbN wire and the surrounding area. Experimentally, a polarization sensitivity below 0.1 is obtained both at 1.31 and 1.55 µm, in excellent agreement with simulations. To reference this document use: http://resolver.tudelft.nl/uuid:d9a4c208-e2f9-486f-8c31-a7534fc94280 DOI https://doi.org/10.1364/OE.26.017697 ISSN 1094-4087 Source Optics Express, 26 (13), 17697-17703 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2018 Anna Mukhtarova, Luca Redaelli, Dibyendu Hazra, Houssaine Machhadani, Stéphane Lequien, Max Hofheinz, Jean Luc Thomassin, Frederic Gustavo, J.R. Zichi, V.G. Zwiller, Eva Monroy, J.A. Gerard Files PDF Opt_Exp_accepted_author_m ... script.pdf 1.12 MB Close viewer /islandora/object/uuid:d9a4c208-e2f9-486f-8c31-a7534fc94280/datastream/OBJ/view