Nanoscale diamond optomechanical devices allow light to be coherently coupled to mechanical resonators, providing a rich platform for optical information processing, with applications including memory, switching, sensing, and wavelength conversion. Recently, it’s been shown that they also allow optical control of quantum memories formed by impurities in the diamond crystal lattice. This interface, in which nanoscale vibrations excited by light drive spin transitions of the defects, enables photons at telecommunication wavelength to address quantum memories with no intrinsic optical transitions.
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