Cited by 2.3kOpen Access
California Institute of Technology
ORCID: 0000-0001-6330-2354Publishes on Mechanical and Optical Resonators, Photonic and Optical Devices, Advanced MEMS and NEMS Technologies. 39 papers and 6k citations.
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In this Letter we use resolved sideband laser cooling to cool a mesoscopic mechanical resonator to near its quantum ground state (phonon occupancy 2.6±0.2), and observe the motional sidebands generated on a second probe laser. Asymmetry in the sideband amplitudes provides a direct measure of the displacement noise power associated with quantum zero-point fluctuations of the nanomechanical resonator, and allows for an intrinsic calibration of the phonon occupation number.