Feedback cooling of a librational degree of freedom of an optically levitated microsphere

Charles P. Blakemore; Denzal Martin; Alexander Fieguth; Nadav Priel; Akio Kawasaki; Giorgio Gratta

doi:10.1117/12.2610056

9 March 2022 Feedback cooling of a librational degree of freedom of an optically levitated microsphere

Charles P. Blakemore, Denzal Martin, Alexander Fieguth, Nadav Priel, Akio Kawasaki, Giorgio Gratta

Proceedings Volume PC12016, Optical and Quantum Sensing and Precision Metrology II; PC120161L (2022) https://doi.org/10.1117/12.2610056
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

An optically-levitated microsphere can be driven into rotation by coupling a rotating electric ﬁeld to the permanent electric dipole moment, resulting in libration about the instantaneous direction of the electric ﬁeld. This degree of freedom can be cooled by applying a phase modulation to the rotation of the electric ﬁeld, effectively damping the motion. The degree of cooling is quantified by applying an impulse and observing the resulting exponential decay of the motion, as well as characterizing the thermally driven spectrum librational motion.

Conference Presentation

Citation Download Citation

Charles P. Blakemore, Denzal Martin, Alexander Fieguth, Nadav Priel, Akio Kawasaki, and Giorgio Gratta "Feedback cooling of a librational degree of freedom of an optically levitated microsphere", Proc. SPIE PC12016, Optical and Quantum Sensing and Precision Metrology II, PC120161L (9 March 2022); https://doi.org/10.1117/12.2610056

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