Elimination of Thermomechanical Noise in Piezoelectric Optomechanical Crystals
arXiv:1812.09417 · doi:10.1103/PhysRevLett.123.093603
Abstract
Mechanical modes are a potentially useful resource for quantum information applications, such as quantum-level wavelength transducers, due to their ability to interact with electromagnetic radiation across the spectrum. A significant challenge for wavelength transducers is thermomechanical noise in the mechanical mode, which pollutes the transduced signal with thermal states. In this paper, we eliminate thermomechanical noise in the GHz-frequency mechanical breathing mode of a piezoelectric optomechanical crystal using cryogenic cooling in a dilution refrigerator. We optically measure an average thermal occupancy of the mechanical mode of only , providing a path towards low-noise microwave-to-optical conversion in the quantum regime.
arXiv commentsix pages, first submitted 12/21/2018. v2: essential revision
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