Single Photon Adiabatic Wavelength Conversion

TL;DR

This paper demonstrates a low-noise, efficient method for single-photon wavelength conversion using an integrated silicon resonator, enabling advanced quantum optical applications.

Contribution

It introduces an adiabatic wavelength conversion technique at the single-photon level with high efficiency and broad wavelength tunability, validated by experimental results.

Findings

Over 10% conversion efficiency for 0.5nm wavelength shifts

Conversion efficiency matches theoretical predictions

Applicable to integrated quantum optical systems

Abstract

Adiabatic wavelength conversion is experimentally demonstrated at a single photon power-level using an integrated Silicon ring resonator. This approach allows conversion of a photon to arbitrary wavelengths with no energy or phase matching constraints. The conversion is inherently low-noise and efficient with greater than 10% conversion efficiencies for wavelength changes up to 0.5nm, more than twenty times the resonators line-width. The observed wavelength change and efficiency agrees well with theory and bright coherent light demonstrations. These results will enable integrated quantum optical wavelength conversion for application ranging from wavelength-multiplexed quantum networks to frequency bin entanglement.