Electromagnetically induced acoustic wave transparency in a diamond mechanical resonator

We propose a potentially practical scheme for realization of electromagnetically induced acoustic wave transparency (EIAT) in a high-Q single-crystal diamond mechanical resonator. Based on the dynamical strain-mediated coupling mechanism, we establish Λ-type and Δ-type transition structures in the subspace spanned by the ground states of the nitrogen-vacancy center, which drives the system into a coherent dark state, the system typically becoming transparent to the acoustic field, giving rise to the EIAT phenomenon. The physical picture behind EIAT is interpreted by using the framework of dressed states. Our work opens up possibilities to utilize this hybrid system as a building block to construct a spin-based physical material for quantum information processing and quantum optics applications, such as "slow sound" and enhanced nonlinear effects.