Optical coupling between atomically-thin black phosphorus and a two dimensional photonic crystal nanocavity

TL;DR

This paper demonstrates the optical coupling of atomically-thin black phosphorus with a 2D photonic crystal nanocavity, advancing the development of near-infrared nanophotonic devices based on 2D materials.

Contribution

It presents the first experimental demonstration of coupling between atomically-thin black phosphorus and a 2D photonic crystal nanocavity.

Findings

Successful placement of BP on nanocavity surface.

Observation of cavity mode emission under optical excitation.

Room temperature optical coupling confirmed.

Abstract

Atomically-thin black phosphorus (BP) is an emerging two dimensional (2D) material exhibiting bright photoluminescence in the near infrared. Coupling its radiation to photonic nanostructures will be an important step toward the realization of 2D material based nanophotonic devices that operate efficiently in the near infrared, which includes the technologically important optical telecommunication wavelength bands. In this letter, we demonstrate the optical coupling between atomically-thin BP and a 2D photonic crystal nanocavity. We employed a home-build dry transfer apparatus for placing a thin BP flake on the surface of the nanocavity. Their optical coupling was analyzed through measuring cavity mode emission under optical carrier injection at room temperature.