Optomechanical cooling and self-stabilization of a waveguide coupled to a whispering-gallery-mode resonator

作     者：RICCARDO PENNETTA SHANGRAN XIE RICHARD ZELTNER JONAS HAMMER PHILIP ST.J.RUSSELL 

作者机构：Max Planck Institute for the Science of LightStaudtstraBe.291058 ErlangenGermany Department of PhysicsFriedrich-Alexander-UniversitatStaudtstraBe.291058 ErlangenGermany 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2020年第8卷第6期

页      面：844-851页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Max-Planck-Gesellschaft 

主　　题：waveguide resonator passive 

摘      要：Laser cooling of mechanical degrees of freedom is one of the most significant achievements in the field of ***,we report,for the first time to the best of our knowledge,efficient passive optomechanical cooling of the motion of a freestanding waveguide coupled to a whispering gallery-mode(WGM)*** waveguide is an 8 mm long glass-fiber nanospike,which has a fundamental flexural resonance atΩ/2π=2.5 kHz and a Q-factor of 1.2×10^*** launching^250μW laser power at an optical frequency close to the WGM resonant frequency,we observed cooling of the nanospike resonance from room temperature down to 1.8 *** cooling of the first higher-order mechanical mode is also *** strong suppression of the overall Brownian motion of the nanospike,observed as an 11.6 dB reduction in its mean square displacement,indicates strong optomechanical stabilization of linear coupling between the nanospike and the cavity *** cooling is caused predominantly by a combination of photothermal effects and optical forces between nanospike and WGM *** results are of direct relevance in the many applications of WGM resonators,including atom physics,optomechanics,and sensing.