Qiu, LiuShomroni, ItayIoannou, MarieMalz, DanielNunnenkamp, AndreasKippenberg, Tobias J.2019-01-232019-01-232019-01-232018-01-0110.1109/OMN.2018.8454553https://infoscience.epfl.ch/handle/20.500.14299/153779WOS:000454732000012Sideband asymmetry between the Stokes and anti-Stokes scattering is a signature of the mechanical oscillators in the quantum regime. It has been demonstrated in several optomechanical systems, as a self-calibrated thermometry method. We present motional sideband asymmetry. measurements of a nano-optomechanical system sideband-cooled close to the ground state, probing simultaneously with red- and blue-detuned tones. Due to a Kerr-type nonlinear cavity response, the measurement can exhibit an artificially increased motional sideband asymmetry. We develop a theoretical model based on Floquet theory that accurately describes our observations. This has wide-ranging implications for schemes utilizing multiple probing or pumping tones.Engineering, Electrical & ElectronicNanoscience & NanotechnologyOpticsEngineeringScience & Technology - Other TopicsOpticscavity optomechanicssideband asymmetrysideband coolingraman-scatteringtext::conference output::conference proceedings::conference paper