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Superconducting Nanowire Single-photon Spectrometer Exploiting Cascaded Photonic Crystal Cavities by Yun, Youngsun; Vetter, Andreas; Stegmueller, Robin; Ferrari, Simone; Pernice, Wolfram H. P.; Rockstuhl, Carsten; Lee, Changhyoup is a scholarly article available to read on EtoBox.

What is Superconducting Nanowire Single-photon Spectrometer Exploiting Cascaded Photonic Crystal Cavities about?

Superconducting nanowire single-photon detectors promise efficient (~100%) and fast (~Gcps) detection of light at the single-photon level. They constitute one of the building blocks to realize integrated quantum optical circuits in a waveguide architecture. The optical response of single-photon detectors, however, is limited to measure only the presence of photons. It misses the capability to resolve the spectrum of a possible broadband illumination. In this work, we propose the optical design for a superconducting nanowire single-photon spectrometer in an integrated optical platform. We exploit a cascade of cavities with different resonance wavelengths side-coupled to a photonic crystal bus waveguide. This allows to demultiplex different wavelengths into different spatial regions, where individual superconducting nanowires that measure the presence of single photons are placed next to these cavities. We employ temporal coupled-mode theory to derive the optimal conditions to achieve a high absorption efficiency in the nanowire with fine spectral resolution. It is shown that the use of a mirror at the end of the cascaded system that terminates the photonic crystal bus waveguide incr

Author

Yun, Youngsun; Vetter, Andreas; Stegmueller, Robin; Ferrari, Simone; Pernice, Wolfram H. P.; Rockstuhl, Carsten; Lee, Changhyoup

Published

2019

Language

EN