2017/02/06 by Yan‐Lei Zhang, Yan-Lei Zhang, Chun‐Hua Dong +8 · 1 citation
Engineering · Physics and Astronomy · #Advanced MEMS and NEMS Technologies #Brillouin scattering #Brillouin zone #Coupling (piping) #Degenerate energy levels #Laser #Mechanical and Optical Resonators #Optics #Optomechanics #Photon #Photonic and Optical Devices #Physics #Quantum mechanics #Resonator #quant-ph
paper · pdf · doi:10.1103/physreva.95.043815
published as Phys. Rev. A 95, 043815 (2017) · 9 pages, 5 figures
arxiv created 2017/02/06 · openalex publication_date 2017/04/11 · arxiv updated 2017/04/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We theoretically study the unique applications of optomechanics based on traveling-wave microresonators, where the optomechanical coupling of degenerate modes (clockwise and counterclockwise) can be enhanced selectively by optically pumping in different propagation directions. We show that the unique features of degenerate optical modes can be applied for the entangled photon generation. Specifically, the coherent coupling between the degenerate optical modes and two acoustic modes is also studied, in which the relative phase of the optomechanical couplings plays a key role in the optical nonreciprocal conversion. In addition, we have studied another mechanical vibration based on the Brillouin scattering in the microresonators. The parity-time symmetry of acoustic modes can be observed in the slightly deformed microresonators because of the interaction of forward and backward stimulated Brillouin scattering in the triple-resonance system. The degenerate modes are in the decoherence-free subspace, which is robust against environmental noises. Based on parameters realized in recent experiments, these optomechanical devices should be readily achievable.