Plasmon-induced transverse optical torque on nanostructures

Ryoma Fukuhara; Yoshito Tanaka; Tsutomu Shimura

doi:10.1117/12.2573788

15 June 2020 Plasmon-induced transverse optical torque on nanostructures

Ryoma Fukuhara, Yoshito Tanaka, Tsutomu Shimura

Proceedings Volume 11522, Optical Manipulation and Structured Materials Conference 2020; 115220S (2020) https://doi.org/10.1117/12.2573788
Event: SPIE Technologies and Applications of Structured Light, 2020, Yokohama, Japan

Abstract

We report that localized surface plasmon resonance allows a single-element nanostructure to induce an extrinsic angular momentum of light in its interaction with a propagating plane wave. The recoil of the angular momentum results in an optical torque on the structure along an axis perpendicular to the optical axis, and the characteristics of this transverse torque depend on the incident polarization state, including the spin direction. Our results suggest that the designed dark plasmon mode can provide a new degree of freedom for optical manipulation of nanoparticles smaller than the diffraction limit.

Citation Download Citation

Ryoma Fukuhara, Yoshito Tanaka, and Tsutomu Shimura "Plasmon-induced transverse optical torque on nanostructures", Proc. SPIE 11522, Optical Manipulation and Structured Materials Conference 2020, 115220S (15 June 2020); https://doi.org/10.1117/12.2573788

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