Efficient and low-noise single-photon-level frequency conversion interfaces using silicon nanophotonics

Published: April 18, 2016


Qing Li, Marcelo I. Davanco, Kartik A. Srinivasan


Optical frequency conversion has applications ranging from tunable light sources to telecommunications band interfaces for quantum information science. Here, we demonstrate efficient, low-noise frequency conversion on a nanophotonic chip through four-wave-mixing Bragg scattering in compact (footprint< 0.5 x 10^-4 cm^2) Si3N4 microring resonators. We investigate three frequency conversion configurations: (1) spectral translation over a few nanometers within the 980 nm band, (2) upconversion from 1550 nm to 980 nm, and (3) downconversion between 980 nm and 1550 nm. With conversion efficiencies ranging from 25 % for the first process to > 60 % for the last two processes, a signal conversion bandwidth > 1 GHz, <60 mW of continuous-wave pump power needed, and noise levels between a few fW and a few pW, these devices are suitable for quantum frequency conversion of single photon states from InAs quantum dots. Simulations based on coupled mode equations and the Lugiato-Lefever equation are used to model device performance, and show quantitative agreement with measurements.
Citation: Nature Photonics
Volume: 10
Issue: 6
Pub Type: Journals
Created April 18, 2016, Updated November 10, 2018