We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm long,550 nm diameter optical nanofiber.The rotation of the nanofiber couples to the polarization of guided laser fields.W...We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm long,550 nm diameter optical nanofiber.The rotation of the nanofiber couples to the polarization of guided laser fields.We use a weak laser probe to monitor the rotation and use feedback to modulate the polarization of an auxiliary drive laser providing torque.Our results present a tool for the optomechanical control of large-scale torsional resonators,with metrological applications and potential implications for studying macroscopic objects in quantum states.展开更多
We demonstrate the optomechanical cooling of a tapered optical nanofiber by coupling the polarization of light to the mechanical angular momentum of the system. The coupling is enabled by birefringence in the fiber an...We demonstrate the optomechanical cooling of a tapered optical nanofiber by coupling the polarization of light to the mechanical angular momentum of the system. The coupling is enabled by birefringence in the fiber and does not make use of an optical resonator. We find evidence for cooling in the distribution of thermally driven amplitude fluctuations and the noise spectrum of the torsional modes. Our proof-of-principle demonstration shows cavity-less cooling of the torsional degree of freedom of a macroscopically extended nanofiber.展开更多
基金National Key Research and Development Program of China(2022YFA1404201)FONDECYT(11200192)+4 种基金CONICYT-PAI(77190033)111 Project(D18001)“1331 KSC”,PCSIRT(IRT_17R70)Fundamental Research Program of Shanxi Province,China(20210302124537)National Natural Science Foundation of China(12034012,12074231,12274272,61827824,62105191)。
文摘We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm long,550 nm diameter optical nanofiber.The rotation of the nanofiber couples to the polarization of guided laser fields.We use a weak laser probe to monitor the rotation and use feedback to modulate the polarization of an auxiliary drive laser providing torque.Our results present a tool for the optomechanical control of large-scale torsional resonators,with metrological applications and potential implications for studying macroscopic objects in quantum states.
基金National Key Research and Development Program of China (2017YFA0304203)National Natural Science Foundation of China (12034012, 61675120,61875110, 6210031464)+5 种基金National Natural Science Foundation of China for Excellent Research Team(61121064)Shanxi "1331 Project" Key Subjects ConstructionPCSIRT (IRT_17R70)111 Project(D18001)CONICYT-PAI (77190033)Fondo Nacional de Desarrollo Científico y Tecnológico (11200192)。
文摘We demonstrate the optomechanical cooling of a tapered optical nanofiber by coupling the polarization of light to the mechanical angular momentum of the system. The coupling is enabled by birefringence in the fiber and does not make use of an optical resonator. We find evidence for cooling in the distribution of thermally driven amplitude fluctuations and the noise spectrum of the torsional modes. Our proof-of-principle demonstration shows cavity-less cooling of the torsional degree of freedom of a macroscopically extended nanofiber.
