Abstract

We propose a scheme for generation of the high-order phonon sideband spectra (HPS) and frequency comb arising from the strain-induced coupling of a nitrogen-vacancy (NV) impurity to a resonant vibrational mode of a diamond nanoresonator. The underlying nonlinear process of the nanomechanical system, due to the coupling between the NV center and an additional pump laser in a phonon nanoresonator, results in the formation of efficient HPS and the frequency comb. Using a perturbation method, we give an explicit analytical expression for second-order phonon sideband generation. Our numerical simulations show that the HPS and frequency comb exhibit ultralow power consumption and good tunability of phonon sideband-line spacing, number, and intensity in a wide parameter range. The sideband-line spacing is determined entirely by the beating frequency between the two input lasers and is as low as a few megahertz. Of particular interest is that the symmetry of the phonon frequency comb can be controlled by adjusting some parameters. Our approach based on a solid system with good integration and expansibility may be useful for the construction of phonon networks.

© 2020 Optical Society of America

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