We investigate a dynamic nonlinear optomechanical system, comprising a nanosphere levitated in a hybrid electro-optical trap. An optical cavity offers readout of both linear-in-position and quadratic-in-position (nonlinear) light-matter coupling, whilst simultaneously cooling the nanosphere, for indefinite periods of time and in high vacuum. Through the rich sideband structure displayed by the cavity output we can observe cooling of the linear and non-linear particle’s motion. Here we present an experimental setup which allows full control over the cavity resonant frequencies, and shows cooling of the particle’s motion as a function of the detuning. This work paves the way to strong-coupled quantum dynamics between a cavity and a mesoscopic object largely decoupled from its environment.
P. Z. G. Fonseca, E. B. Aranas, J. Millen, T. S. Monteiro, and P. F. Barker, "Nonlinear dynamics and cavity cooling of levitated nanoparticles," Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99220D (Presented at SPIE Nanoscience + Engineering: August 28, 2016; Published: 16 September 2016); https://doi.org/10.1117/12.2239020.
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