This thesis presents experimental research on the interaction between the optical field and the mechanical oscillator in whispering-gallery mode microcavities. It demonstrates how optomechanical interactions in a microresonator can be used to achieve non-magnetic non-reciprocity and develop all-optically controlled non-reciprocal multifunctional photonic devices. The thesis also discusses the interaction between the travelling optical and mechanical whispering-gallery modes, paving the way for non-reciprocal light storage as a coherent, circulating acoustic wave with a lifetime of up to tens of microseconds. Lastly, the thesis presents a high-frequency phase-sensitive heterodyne vibrometer, operating up to 10 GHz, which can be used for the high-resolution, non-invasive mapping of the vibration patterns of acoustic devices. The results presented here show that optomechanical devices hold great potential in the field of information processing.
Introduction.- Whispering-gallery modes microcavity.- Optomechanical interaction.- Optomechanically induced non-reciprocity.- Brillouin-scattering-induced transparency and non-reciprocal light storage.- Packaged optomechanical microresonator.- sensitive imaging of vibrational mode.- Conclusion.
Dr. Zhen Shen received his Ph.D. from the University of Science and Technology of China, Hefei in 2017, under the supervision of Prof. Chun-Hua Dong. His research chiefly focuses on micro/nano optics, microcavities and optomechanics.
