Hybrid Interference Induced Flat Band Localization in Bipartite Optomechanical Lattices

TL;DR

This paper demonstrates a controllable flat band in bipartite optomechanical lattices caused by hybrid photon-phonon interference, offering new insights into flat band localization and its experimental detection.

Contribution

It introduces a novel flat band mechanism in bipartite optomechanical lattices via hybrid interference, distinct from geometric effects, and discusses its controllability and experimental detectability.

Findings

Flat band induced by hybrid photon-phonon interference.

Controllable flat band with unique local density of states pattern.

Potential for experimental observation and applications in optomechanics.

Abstract

The flat band localization, as an important phenomenon in solid state physics, is fundamentally interesting in the exploration of exotic ground property of many-body system. Here we demonstrate the appearance of a flat band in a general bipartite optomechanical lattice, which could have one or two dimensional framework. Physically, it is induced by the hybrid interference between the photon and phonon modes in optomechanical lattice, which is quite different from the destructive interference resulted from the special geometry structure in the normal lattice (e.g., Lieb lattice). Moreover, this novel flat band is controllable and features a special local density of states (LDOS) pattern, which makes it is detectable in experiments. This work offers an alternative approach to control the flat band localization with optomechanical interaction, which may substantially advance the fields of cavity optomechanics and solid state physics.