SAMOP 2023 – scientific programme

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SYQR: Symposium Quantum Optics and Quantum Information with Rigid Rotors

SYQR 2: Quantum Optics and Quantum Information with Rigid Rotors 2

SYQR 2.1: Invited Talk

Friday, March 10, 2023, 14:30–15:00, E415

Rotational optomechanics with levitated nanodumbbells — •Tongcang Li — Purdue University, West Lafayette, USA

Thanks to its geometry, an optically levitated nanodumbbell is ideal for studying rotational optomechanics. We have synthesized and optically levitated silica nanodumbbells in a high vacuum. With a linearly polarized laser, we observed the torsional vibration (liberation) of a levitated nanodumbbell. With a circularly polarized laser, we drove a nanodumbbell to rotate beyond 1 GHz. We show an optically levitated nanodumbbell is an ultrasensitive torque detector. Recently, we levitated a nanodumbbell near a surface to study surface interactions.