The fundamental mechanism behind optomechanical coupling involves the interaction between the electromagnetic field of light and the mechanical motion of a nanostructure. When light is confined in a nanocavity, the optical field can exert a radiation pressure on the mechanical element, causing it to move. Conversely, the mechanical motion can change the properties of the optical field, such as its frequency or phase. This bidirectional interaction allows for the transfer of energy and information between the optical and mechanical domains.
