Efficient upconversion of sub-THz radiation in a high-Q whispering gallery resonator

TL;DR

This paper demonstrates a highly efficient method for converting sub-THz radiation into optical signals using a high-Q whispering gallery resonator with nonlinear properties, achieving significant power conversion with minimal pump power.

Contribution

It introduces a novel approach utilizing a high-Q whispering gallery resonator for efficient sub-THz to optical upconversion with high power efficiency at low pump power.

Findings

Achieved 5x10^{-3} power conversion efficiency.

Converted 100 GHz signals with only 16 mW optical pump.

Demonstrated effective upconversion in a high-Q resonator.

Abstract

We demonstrate efficient upconversion of sub-THz radiation into the optical domain in a high-Q whispering gallery mode resonator with quadratic optical nonlinearity. The 5x10^{-3} power conversion efficiency of continuous wave 100GHz signal is achieved with only 16 mW of optical pump.