Tightly focusing characteristics of perfect vortex vector beam

Ruitong Liang; Chonglei Zhang

doi:10.1117/12.3022817

18 March 2024 Tightly focusing characteristics of perfect vortex vector beam

Ruitong Liang, Chonglei Zhang

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131042A (2024) https://doi.org/10.1117/12.3022817
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

Light is an electromagnetic wave that satisfies the solution of Maxwell’s equations and can carry information such as intensity, frequency, phase, and polarization. The polarization and phase modulation of light have received widespread attention from researchers in recent years. A vector beam can be obtained by non-uniform modulation of the polarization information of the beam. A vortex beam can be obtained by adding a spiral phase. By simultaneously modulating the polarization and phase of the beam, some new types of beams can be obtained with different characteristics. In this work, under the tightly focusing conditions, the focused light field distributions of Radially-polarized beam, Azimuthally-polarized beam, Radially-polarized Vortex beam, Azimuthally-polarized Vortex beam, Radially-polarized Perfect Optical Vortex beam and Azimuthally-polarized Perfect Optical Vortex beam are calculated. After comparison, it can be found that the Azimuthally-polarized Perfect Optical Vortex beam has the smallest spot size under the same focusing conditions, exceeding the diffraction limit. We designed a point scanning imaging system based on scattering to verify this conclusion by imaging the resolution plate of the grating structure.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ruitong Liang and Chonglei Zhang "Tightly focusing characteristics of perfect vortex vector beam", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131042A (18 March 2024); https://doi.org/10.1117/12.3022817

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