Collective scattering from quantum dots in a photonic crystal waveguide

TL;DR

This paper demonstrates how strain-tuning quantum dots in a photonic crystal waveguide enhances nonlinear light scattering, opening new avenues for multi-emitter quantum optics in solid-state systems.

Contribution

It introduces a method to achieve collective scattering from quantum dots in a photonic crystal waveguide by strain-tuning their optical transitions into resonance.

Findings

Enhanced nonlinearity observed when quantum dots are in resonance.

Demonstrated manipulation of few-photon optical nonlinearities.

Established potential for multi-emitter quantum optics in solid-state platforms.

Abstract

We demonstrate scattering of laser light from two InAs quantum dots coupled to a photonic crystal waveguide, which is achieved by strain-tuning the optical transitions of the dots into mutual resonance. By performing measurements of the intensity and photon statistics of transmitted laser light before and after tuning the dots into resonance, we show that the nonlinearity is enhanced by collective scattering. In addition to providing a means of manipulating few-photon optical nonlinearities, our approach establishes new opportunities for multi-emitter quantum optics in a solid-state platform.