Hypergrating for Focusing Vortex Beam Below Diffraction Limit

Wenhao Li,Evan Simmons,Jacob M LaMountain,Viktor A. Podolskiy,Natalia M. Litchinitser

Conference on Lasers and Electro-Optics（2022）

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摘要

Light with an orbital angular momentum can strongly modify optical transition selection rules when beam size is reduced to subwavelength scale. We demonstrated a method for focusing orbital angular momentum beams below the diffraction limit.

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关键词

vortex beam,diffraction limit,orbital angular momentum,optical transition selection rules,beam size,subwavelength scale

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