# Gate-tunable emission of exciton-plasmon polaritons in hybrid MoS2-gap-mode metasurfaces

## TL;DR

This paper demonstrates electrically tunable emission of exciton-plasmon polaritons in hybrid MoS2-gap-mode metasurfaces, enabling real-time control of light-matter interactions at nanoscale through gating.

## Contribution

It introduces a novel hybrid metasurface system coupling MoS2 monolayers with GSP metasurfaces, with electrical tuning of emission properties.

## Key findings

- Selective enhancement of exciton-plasmon polariton emissions.
- Electrical gating enables tunable emission wavelengths.
- Real-time manipulation of light-matter interactions at nanoscale.

## Abstract

The advance in designing arrays of ultrathin two-dimensional optical nano-resonators, known as metasurfaces, is currently enabling a large variety of novel flat optical components. The remarkable control over the electromagnetic fields offered by this technology can be further extended to the active regime in order to manipulate the light characteristics in real-time. In this contribution, we couple the excitonic resonance of atomic thin MoS2 monolayers with gap-surface-plasmon (GSP) metasurfaces, and demonstrate selective enhancement of the exciton-plasmon polariton emissions. We further demonstrate tunable emissions by controlling the charge density at interface through electrically gating in MOS structure. Straddling two very active fields of research, this demonstration of electrically tunable light-emitting metasurfaces enables real-time manipulation of light-matter interactions at the extreme subwavelength dimensions.

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Source: https://tomesphere.com/paper/1907.05760