SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 32: Quantum Optics and Quantum Information with Rigid Rotors (joint session MO/Q/QI)

QI 32.2: Talk

Thursday, March 9, 2023, 14:45–15:00, F102

Structured transverse orbital angular momentum probed by a levitated optomechanical sensor — Yanhui Hu, •James Sabin, Mudassar Rashid, and James Millen — Department of Physics, King's College London, Strand, London

The optical control of anisotropic particles opens up applications in torque sensing and the study of rotational quantum mechanics. The angular modes of a levitated particle are markedly different from the linear modes, and new tools are required to achieve full control. In the Levitated Nanophysics Group at King's College London we work with nanofabricated silicon nanorods, which allow enhanced control over all degrees-of-freedom. We control the rotation of the nanorods through a recently discovered method for generating transverse optical vortices, which can be used to exert a large torque on an array of levitated nanoparticles. We also present a method to simultaneously cool all of the linear and angular modes of levitated, anisotropic particles, without the necessity for a delicate optical cavity.