Phonon and photon lasing dynamics in optomechanical cavities

作     者：Jian Xiong Zhilei Huang Kaiyu Cui Xue Feng Fang Liu Wei Zhang Yidong Huang Jian Xiong;Zhilei Huang;Kaiyu Cui;Xue Feng;Fang Liu;Wei Zhang;Yidong Huang

作者机构：Department of Electronic EngineeringTsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and TechnologyBeijing 100084China Beijing Academy of Quantum Information ScienceBeijing 100193China 

出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)

年 卷 期：2023年第3卷第1期

页      面：37-44页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

基　　金：supported by the National Key R&D Program of China under Contracts No.2018YFB2200402 the National Natural Science Foundation of China(61775115,91750206,61575102,and 61621064) the Opened Fund of the State Key Laboratory on Integrated Optoelectronics(IOSKL2016KF01) Beijing Innovation centre for Future Chips,Tsinghua University. 

主　　题：Nonlinear optics Optomechanical Crystal Cavity optomechanics Phonon lasing Limit cycle 

摘      要：Lasers differ from other light sources in that they are coherent,and their coherence makes them indispensable to both fundamental research and practical application.In optomechanical cavities,photon and phonon lasing is facilitated by the ability of photons and phonons to interact intensively and excite one another coherently.The lasing linewidths of both phonons and photons are critical for practical application.This study investigates the lasing linewidths of photons and phonons from the underlying dynamics in an optomechanical cavity.We find that the linewidths can be accounted for by two distinct physical mechanisms in two regimes,namely the normal regime and the reversed regime,where the intrinsic optical decay rate is either larger or smaller than the intrinsic mechanical decay rate.In the normal regime,an ultra-narrow spectral linewidth of 5.4 kHz for phonon lasing at 6.22 GHz can be achieved regardless of the linewidth of the pump light,while these results are counterintuitively unattainable for photon lasing in the reversed regime.These results pave the way towards harnessing the coherence of both photons and phonons in silicon photonic devices and reshaping their spectra,potentially opening up new technologies in sensing,metrology,spectroscopy,and signal processing,as well as in applications requiring sources that offer an ultra-high degree of coherence.