Near-infrared single-photon spectroscopy of a whispering gallery mode resonator using energy-resolving transition edge sensors

TL;DR

This paper introduces a dispersive-element-free spectroscopy method for near-infrared single photons using energy-resolving transition edge sensors, enabling precise characterization of photons from a whispering gallery mode resonator.

Contribution

It presents a novel spectroscopy technique utilizing transition edge sensors for near-infrared photons, eliminating the need for traditional dispersive elements.

Findings

Achieved wavelength measurement uncertainty of up to 2 nm.

Successfully characterized tunable narrow-band single photons from a whispering gallery mode resonator.

Demonstrated the method's effectiveness for photon wavelength measurement.

Abstract

We demonstrate a method to perform spectroscopy of near-infrared single photons without the need of dispersive elements. This method is based on a photon energy resolving transition edge sensor and is applied for the characterization of widely wavelength tunable narrow-band single photons emitted from a crystalline whispering gallery mode resonator. We measure the emission wavelength of the generated signal and idler photons with an uncertainty of up to 2 nm.