Coupling of a Single Diamond Nanocrystal to a Whispering-Gallery Microcavity: Photon Transportation Benefitting from Rayleigh Scattering

TL;DR

This paper investigates how Rayleigh scattering caused by a diamond nanocrystal in a whispering-gallery microcavity influences photon transport, enabling advanced quantum effects and high-efficiency photon turnstiles with position immunity.

Contribution

It reveals the significant role of Rayleigh scattering in photon transport within cavity QED systems and proposes a robust photon turnstile design.

Findings

Rayleigh scattering enhances photon transport and quantum effects.

Photon turnstiles are highly immune to nanocrystal position.

Novel photon phenomena like dipole induced transparency observed.

Abstract

We study the Rayleigh scattering induced by a diamond nanocrystal in a whispering-gallery-microcavity--waveguide coupling system, and find that it plays a significant role in the photon transportation. On one hand, this study provides a new insight into future solid-state cavity quantum electrodynamics toward strong coupling physics. On the other hand, benefitting from this Rayleigh scattering, novel photon transportation such as dipole induced transparency and strong photon antibunching can occur simultaneously. As potential applications, this system can function as high-efficiency photon turnstiles. In contrast to [B. Dayan \textit{et al.}, \textrm{Science} \textbf{319},1062 (2008)], the photon turnstiles proposed here are highly immune to nanocrystal's azimuthal position.