Invited
Diamond Optomechanics for Coherent Pulse Storage, Wavelength Conversion, and all Optical Switching

Diamond cavity optomechanical devices are used to demonstrate pulse storage, wavelength conversion and all optical switching. These devices are promising for coherent optical storage and information processing, as well as quantum applications.

Nanoscale cavity optomechanical devices enhance the interaction between co-localized optical cavity and nanomechanical resonances. Diamond optomechanical devices have low optical and mechanical dissipation and can support high optical intensity thanks to diamond’s low two-photon absorption at telecommunication wavelengths. This mediates strong optical forces that can be used to coherent coupling light to mechanical resonances of the device. Here we harness this coupling to coherently transfer a pulse of light to the mechanical motion of a diamond microdisk cavity optomechanical device. This pulse storage scheme allows microsecond long optical delays that are optically tunable, and during which the phase and frequency of the stored information can be coherently manipulated. These same devices can also be used for wideband wavelength conversion in which the pulse is readout at a wavelength 40 nm detuned from the input pulse, and phase sensitive all optical switching using a novel double OMIT scheme.