# Near-field energy transfer between a luminescent 2D material and color centers in diamond

## TL;DR

This paper demonstrates F"orster resonance energy transfer between NV centers in diamond and WSe$_2$, revealing new hybrid quantum system possibilities for controlling spin phenomena.

## Contribution

It provides the first experimental evidence of FRET between diamond NV centers and 2D materials, opening avenues for hybrid quantum system development.

## Key findings

- FRET occurs between NV centers and WSe$_2$ as shown by fluorescence lifetime imaging.
- NV centers can excite WSe$_2$ photoluminescence via energy transfer.
- The system enables new control strategies for spin transfer and valley physics.

## Abstract

Energy transfer between fluorescent probes lies at the heart of many applications ranging from bio-sensing and -imaging to enhanced photo-detection and light harvesting. In this work, we study F\"orster resonance energy transfer (FRET) between shallow defects in diamond --- nitrogen-vacancy (NV) centers --- and atomically-thin, two-dimensional materials --- tungsten diselenide (WSe$_2$). By means of fluorescence lifetime imaging, we demonstrate the occurrence of FRET in the WSe$_2$/NV system. Further, we show that in the coupled system, NV centers provide an additional excitation pathway for WSe$_2$ photoluminescence. Our results constitute the first step towards the realization of hybrid quantum systems involving single-crystal diamond and two-dimensional materials that may lead to new strategies for studying and controlling spin transfer phenomena and spin valley physics.