Electrical tuning of exciton-plasmon polariton coupling in monolayer MoS2 integrated with plasmonic nanoantenna lattice

TL;DR

This paper demonstrates electrical tuning of exciton-plasmon polariton coupling in monolayer MoS2 integrated with plasmonic nanoantennas, enabling dynamic control of optical interactions for advanced optoelectronic applications.

Contribution

It introduces a method to electrically modulate exciton-plasmon coupling in a 2D semiconductor-nanoantenna system, bridging strong and weak coupling regimes via electrostatic doping.

Findings

Coupling strength can be tuned dynamically with electric fields.

Strong coupling between charged excitons and plasmons observed.

Optical properties of the system are controllable in real-time.

Abstract

Active control of light-matter interactions in semiconductors is critical for realizing next generation optoelectronic devices, with tunable control of the systems optical properties via external fields. The ability to manipulate optical interactions in active materials coupled to cavities via geometrical parameters, which are fixed along with dynamic control with applied fields opens up possibilities of controlling exciton lifetimes, oscillator strengths and their relaxation properties. Here, we demonstrate electrical control of exciton-plasmon polariton coupling strength of a two-dimensional semiconductor integrated with plasmonic nanoresonators assembled in a field-effect transistor device between strong and weak coupling limits by electrostatic doping. As a result, the exciton-plasmon polarion dispersion can be altered dynamically with applied electric field by modulating the excitonic properties of monolayer MoS2 arising from many-body effects with carrier concentration. In addition, strong coupling between charged excitons plasmons was also observed upon increased carrier injection. The ability to dynamically control the optical properties of an ultra-thin semiconductor with plasmonic nanoresonators and electric fields demonstrates the versatility of the coupled system and offers a new platform for the design of optoelectronic devices with precisely tailored responses.