Modelling the influence of planar waveguide cladding thickness on the absorption efficiency of a superconducting NbN strip

doi:10.18721/JPM.163.214

St. Petersburg Polytechnic University Journal - Physics and Mathematics Peter the Great St. Petersburg Polytechnic University

Since 2008

ISSN 2304-9782

ISSN 2618-8686

ISSN 2405-7223

Year: 2023 Volume: 16 Issue: 3.2

Pages: 443

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UDK: 681.782.473

DOI: 10.18721/JPM.163.214

Article type: Conference Report, Theses of Report

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Modelling the influence of planar waveguide cladding thickness on the absorption efficiency of a superconducting NbN strip

Physical optics

Authors:

Shibalov Maksim Mumlyakov Alexander M. Korneeva Yuliya P. Asharchuk Ilya M. Smirnov Konstantin V. Vovk Nikolay A.

Abstract:

This paper reports simulation results for 1550 nm wavelength absorption efficiency of a superconducting NbN nanowire coupled to a single-mode Si₃N₄ waveguide depending on SiO₂ cladding thickness. Simulation results for straight, U- and W-shaped strips show that with perfect planarization (no top cladding) the absorption coefficient per unit length is 0.031, 0.07 and 0.11 dB/µm, respectively.