Fiber-coupled semiconductor waveguides as an efficient optical interface to a single quantum dipole

TL;DR

This paper theoretically demonstrates that fiber-coupled semiconductor waveguides can efficiently collect emission from a single quantum dipole and significantly alter light transmission, promising advances in quantum optical interfaces.

Contribution

It introduces a theoretical model showing high collection efficiency and tunable transmission modulation using fiber-coupled semiconductor waveguides for quantum emitters.

Findings

Approximately 70% emission collection efficiency into a single-mode fiber.

Over an order of magnitude change in resonant light transmission.

Strong modification of light transmission by the quantum dipole.

Abstract

We theoretically investigate the interaction of a single quantum dipole with the modes of a fiber-coupled semiconductor waveguide. Through a combination of tight modal confinement and phase-matched evanescent coupling, we predict that approximately 70 % of the dipole's emission can be collected into a single mode optical fiber. Calculations further show that the dipole strongly modifies resonant light transmission through the system, with over an order of magnitude change possible for an appropriate choice of fiber-waveguide coupler geometry.