A 25-element defect-free array of levitated microspheres in vacuum is demonstrated using time-shared optical traps, with sub-nanometer per root hertz camera-based displacement sensitivity.
Rotational Quantum Friction
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abstract
We investigate the frictional forces due to quantum fluctuations acting on a small sphere rotating near a surface. At zero temperature, we find the frictional force near a surface to be several orders of magnitude larger than that for the sphere rotating in vacuum. For metallic materials with typical conductivity, quantum friction is maximized by matching the frequency of rotation with the conductivity. Materials with poor conductivity are favored to obtain large quantum frictions. For semiconductor materials that are able to support surface plasmon polaritons, quantum friction can be further enhanced by several orders of magnitude due to the excitation of surface plasmon polaritons.
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physics.optics 1years
2024 1verdicts
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Optical Levitation of Arrays of Microspheres
A 25-element defect-free array of levitated microspheres in vacuum is demonstrated using time-shared optical traps, with sub-nanometer per root hertz camera-based displacement sensitivity.