# Coupling quantum emitters in 2D materials with tapered fibers

## TL;DR

This paper demonstrates the successful coupling of a single quantum emitter in a 2D material with a tapered optical fiber, achieving a 10% collection efficiency and enabling fully fiber-coupled excitation and detection for integrated photonic systems.

## Contribution

It introduces a novel method for coupling 2D material-based quantum emitters with tapered fibers, advancing integrated photonic circuit development.

## Key findings

- Achieved 10% collection efficiency with a 2D material emitter and tapered fiber.
- Analyzed angular emission pattern via back focal plane imaging.
- Enabled fully fiber-coupled excitation and detection of the quantum emitter.

## Abstract

Realization of integrated photonic circuits on a single chip requires controlled manipulation and integration of solid-state quantum emitters with nanophotonic components. Previous works focused on emitters embedded in a three-dimensional crystals -- such as nanodiamonds or quantum dots. In contrast, in this work we demonstrate coupling of a single emitter in a two-dimensional (2D) material, namely hexagonal boron nitride (hBN), with a tapered optical fiber and find a collection efficiency of the system is found to be 10~\%. Furthermore, due to the single dipole character of the emitter, we were able to analyse the angular emission pattern of the coupled system via back focal plane imaging. The good coupling efficiency to the tapered fiber even allows excitation and detection in a fully fiber coupled way yielding a true integrated system. Our results provide evidence of the feasibility to efficiently integrate quantum emitters in 2D materials with photonic structures.