Dissipative optomechanics of a single-layer graphene in a microcavity

TL;DR

This paper investigates a novel dissipative optomechanical coupling mechanism involving a single-layer graphene in a microcavity, enabling tunable interactions and ground-state cooling of graphene's flexural mode.

Contribution

It introduces a new dissipative coupling scheme via graphene's absorption loss modulation, distinct from traditional systems, with potential for ground-state cooling.

Findings

Strong, tunable dissipative coupling achieved

Graphene's flexural mode can be cooled to ground state

Provides new insights for visible-range graphene optomechanics

Abstract

We study the optomechanical coupling of a single-layer graphene with a high-Q Fabry-Perot microcavity in the membrane-in-the-middle configuration. In ordinary dissipative coupling systems, mechanical oscillators modulate the loss associated with the input coupling of the cavity mode; while in our system, the graphene oscillator couples dissipatively with the cavity mode through modulating its absorption loss. By analyzing the effects of the interband transition of a graphene suspended near the node of the cavity field, we obtain strong and tunable dissipative coupling without excessively reducing the optical quality factor. Finally, it is found that the flexural mode of the graphene could be cooled down to its ground state in the present coupling system. This study provides new insights for graphene optomechanics in the visible range.