Journal
PHOTONICS
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/photonics9020078
Keywords
hetero-optomechanical crystals; zipper cavity; multimode optomechanics
Categories
Funding
- National Key R&D Program of China [2018YFB2200402]
- National Natural Science Foundation of China [91750206, 61775115]
- Beijing Municipal Science Technology Commission [Z201100004020010]
- Beijing National Science Foundation [Z180012]
- Beijing Frontier Science Center for Quantum Information
- Beijing Academy of Quantum Information Sciences
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This study proposes a hetero-optomechanical crystal (OMC) zipper cavity as a versatile platform for multimode optomechanics. By utilizing heterostructure and high-frequency breathing modes, the cavity operates in the deep-sideband-resolved regime and exhibits mechanical coherence. The proposed cavity provides a playground for studying multimode optomechanics in both classical and quantum regimes.
Multimode optomechanics exhibiting several intriguing phenomena, such as coherent wavelength conversion, optomechanical synchronization, and mechanical entanglements, has garnered considerable research interest for realizing a new generation of information processing devices and exploring macroscopic quantum effect. In this study, we proposed and designed a hetero-optomechanical crystal (OMC) zipper cavity comprising double OMC nanobeams as a versatile platform for multimode optomechanics. Herein, the heterostructure and breathing modes with high mechanical frequency ensured the operation of the zipper cavity at the deep-sideband-resolved regime and the mechanical coherence. Consequently, the mechanical breathing mode at 5.741 GHz and optical odd mode with an intrinsic optical Q factor of 3.93 x 10(5) were experimentally demonstrated with an optomechanical coupling rate g(0) = 0.73 MHz between them, which is comparable to state-of-the-art properties of the reported OMC. In addition, the hetero-zipper cavity structure exhibited adequate degrees of freedom for designing multiple mechanical and optical modes. Thus, the proposed cavity will provide a playground for studying multimode optomechanics in both the classical and quantum regimes.
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