本文基于一个含有光学参量放大器的腔光力系统,其中腔场和机械场之间具有线性和二次色散耦合的相互作用,研究了二次光力耦合与参量放大器对本征模劈裂的重要影响。通过分析腔场涨落项的输出谱和机械振子位移的涨落谱,得出结论:腔场和机...本文基于一个含有光学参量放大器的腔光力系统,其中腔场和机械场之间具有线性和二次色散耦合的相互作用,研究了二次光力耦合与参量放大器对本征模劈裂的重要影响。通过分析腔场涨落项的输出谱和机械振子位移的涨落谱,得出结论:腔场和机械场均呈现出本征模劈裂的现象,光学参量放大器非线性增益值的大小及二次光力耦合强度均正比于劈裂谱两峰之间的距离,即二者对本征模劈裂效应具有相似的调控作用。本文同时也验证了文献[Journal of Modern Optics,66(5):494–501(2019)]的结论:具有线性和二次耦合的光力系统可以是含有光学参量放大器混合光力系统的一个替代研究平台。展开更多
Optomechanical dynamics in two systems which are a transmission line resonator and Fabrya-Perot optical cavity via radiation-pressure are investigated by linearized quantum Langevin equation. We work in the resolved s...Optomechanical dynamics in two systems which are a transmission line resonator and Fabrya-Perot optical cavity via radiation-pressure are investigated by linearized quantum Langevin equation. We work in the resolved sideband regime where the oscillator resonance frequency exceeds the cavity linewidth. Normal mode splittings of the mechanical resonator as a pure result of the coupling interaction in the two optomechanical systems is studied, and we make a comparison of normal mode splitting of mechanical resonator between the two systems. In the optical cavity, the normal mode splitting of the movable mirror approaches the latest experiment very well. In addition, an approximation scheme is introduced to demonstrate the ground state cooling, and we make a comparison of cooling between the two systems dominated by two key factors, which are the initial bath temperature and the mechanical quality factor. Since both the normal mode splitting and cooling require working in the resolved sideband regime, whether the normal mode splitting influences the cooling of the mirror is considered. Considering the size of the mechanical resonator and precooling the system, the mechanical resonator in the transmission line resonator system is easier to achieve the ground state cooling than in optical cavity.展开更多
文摘本文基于一个含有光学参量放大器的腔光力系统,其中腔场和机械场之间具有线性和二次色散耦合的相互作用,研究了二次光力耦合与参量放大器对本征模劈裂的重要影响。通过分析腔场涨落项的输出谱和机械振子位移的涨落谱,得出结论:腔场和机械场均呈现出本征模劈裂的现象,光学参量放大器非线性增益值的大小及二次光力耦合强度均正比于劈裂谱两峰之间的距离,即二者对本征模劈裂效应具有相似的调控作用。本文同时也验证了文献[Journal of Modern Optics,66(5):494–501(2019)]的结论:具有线性和二次耦合的光力系统可以是含有光学参量放大器混合光力系统的一个替代研究平台。
基金supported by the National Natural Science Foundation of China (Grant Nos. 10647132 and 11104113)the Scientific Research Fund of Hunan Provincial Education Department of China (Grant No. 10A100)
文摘Optomechanical dynamics in two systems which are a transmission line resonator and Fabrya-Perot optical cavity via radiation-pressure are investigated by linearized quantum Langevin equation. We work in the resolved sideband regime where the oscillator resonance frequency exceeds the cavity linewidth. Normal mode splittings of the mechanical resonator as a pure result of the coupling interaction in the two optomechanical systems is studied, and we make a comparison of normal mode splitting of mechanical resonator between the two systems. In the optical cavity, the normal mode splitting of the movable mirror approaches the latest experiment very well. In addition, an approximation scheme is introduced to demonstrate the ground state cooling, and we make a comparison of cooling between the two systems dominated by two key factors, which are the initial bath temperature and the mechanical quality factor. Since both the normal mode splitting and cooling require working in the resolved sideband regime, whether the normal mode splitting influences the cooling of the mirror is considered. Considering the size of the mechanical resonator and precooling the system, the mechanical resonator in the transmission line resonator system is easier to achieve the ground state cooling than in optical cavity.
