Optical spin torque on a Rayleigh particle by photonic hook

Bojian Wei; Shuhong Gong; Renxian Li; Pavel F. Baranov; Oleg V. Minin; Igor V. Minin

doi:10.1117/12.2621581

24 May 2022 Optical spin torque on a Rayleigh particle by photonic hook

Bojian Wei, Shuhong Gong, Renxian Li, Pavel F. Baranov, Oleg V. Minin, Igor V. Minin

Proceedings Volume 12152, Mesophotonics: Physics and Systems at Mesoscale; 1215209 (2022) https://doi.org/10.1117/12.2621581
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

The optical spin torque (OST) exerted on a dielectric Rayleigh spherical particle by photonic hook is investigated in the framework of dipole approximation. Optical spin torque is a type of optical torque that causes a particle to rotate around its center of mass. I.V. Minin and O.V.Minin discovered the photonic hook phenomenon in 2015 (Patent of Russia 161207). They used the combined structure of cube and prism to form a curved beam to pull a small particle, which caused a great sensation in the field of photonics. In this paper, the photonic hook is generated by a plane wave illuminating a dielectric irregular cuboid with one corner cut off. The effects of wavelength and slope of cutting of the irregular cuboid on the OST are analyzed. The numerical results show that the wavelength and inclination of cutting greatly affect the OST. Optical spin torques contain a large amount of negative torques and are sensitive to the slope of cutting of the irregular cuboid. The results of this paper are expected to provide theoretical support for the manipulation and rotation of Rayleigh particles in structured wavelength-scaled localized beams.

Conference Presentation

Citation Download Citation

Bojian Wei, Shuhong Gong, Renxian Li, Pavel F. Baranov, Oleg V. Minin, and Igor V. Minin "Optical spin torque on a Rayleigh particle by photonic hook", Proc. SPIE 12152, Mesophotonics: Physics and Systems at Mesoscale, 1215209 (24 May 2022); https://doi.org/10.1117/12.2621581

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