Resonant squeezed light from photonic Cooper pairs

TL;DR

This paper introduces a nonperturbative theory describing photonic Cooper pairs, called Ramanitons, which enable resonant squeezed light generation in waveguides through quantum oscillations between photons and phonons.

Contribution

It presents a novel nonperturbative model for photon-phonon interactions, predicting resonant squeezed light from photonic Cooper pairs in integrated photonic devices.

Findings

Up to 28 dB of squeezed light predicted in silicon waveguides.

Quantum oscillations between photon and phonon states demonstrated.

Resonant squeezing occurs when phonon occupation reaches zero.

Abstract

Raman scattering of photons into phonons gives rise to entangled photon pairs when the phonon emitted in a Stokes process is coherently absorbed in antiStokes scattering, forming the photonic analog of Cooper pairs. We present a nonperturbative theory for the time evolution of photonic Cooper pairs that treats interacting photons and phonons as a hybrid excitation, the Ramaniton. As the Ramaniton propagates in a wave guide it displays quantum oscillations between photon and phonon occupation, leading to resonant squeezed Stokes-antiStokes light when the phonon occupation becomes equal to zero without recurring back to the photon vacuum. This phenomenon is predicted to generate up to 28 dB of squeezed light even in standard silicon on insulator waveguides.