The optical vortices focusing by subwavelength microelements with variable relief height using high-performance computer systems

Dmitry A. Savelyev

doi:10.1117/12.2680826

4 October 2023 The optical vortices focusing by subwavelength microelements with variable relief height using high-performance computer systems

Dmitry A. Savelyev

Author Affiliations +

Proceedings Volume 12743, Optical Technologies for Telecommunications 2022; 127430X (2023) https://doi.org/10.1117/12.2680826
Event: Optical Technologies for Telecommunications 2022, 2022, Ufa, Russian Federation

Abstract

The subwavelength ring gratings with a gradient refractive index (GRIN) of the substrate and variable height are calculated and investigated. The grating period is 1.05λ. Two variants of changing the refractive index n of the GRIN substrate were considered: from the maximum n in the center to the minimum n at the edges and the reverse case. The propagation of light through the proposed 3D microstructures was modeled using the finite difference time domain method. The possibility of reducing the focal spot size is shown using the proposed 3D microstructures, and the formation of an extended light needle and optical traps is also demonstrated.

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Dmitry A. Savelyev "The optical vortices focusing by subwavelength microelements with variable relief height using high-performance computer systems", Proc. SPIE 12743, Optical Technologies for Telecommunications 2022, 127430X (4 October 2023); https://doi.org/10.1117/12.2680826

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