TY - JOUR

T1 - Polarization-Mode Transformation of the Light Field during Diffraction on Amplitude Binary Gratings

AU - Хорин, Павел

AU - Мамаева, Мария Павловна

AU - Капитонов, Юрий Владимирович

AU - Хонина, Светлана Николаевна

PY - 2024/9/6

Y1 - 2024/9/6

N2 - In this paper, a comparative analysis and numerical simulation of operation of two types of amplitude binary gratings (conventional and fork), both in the focal plane and near-field diffraction under illumination by mode beams with different polarization states, were performed. The simulation of the field formation in the focal plane was performed using the Richards–Wolf formalism. The diffraction calculation in the near-field diffraction was performed based on the FDTD method, considering the 3D structure of optical elements. The possibility of multiplying the incident beam in different diffraction orders of binary gratings and the polarization transformation associated with spin–orbit interaction at tight focusing were shown. In this case, various polarization transformations were formed in ±1 diffraction orders of the fork grating due to different signs of the introduced vortex-like phase singularity. The obtained results can be useful for the laser processing of materials and surface structuring.

AB - In this paper, a comparative analysis and numerical simulation of operation of two types of amplitude binary gratings (conventional and fork), both in the focal plane and near-field diffraction under illumination by mode beams with different polarization states, were performed. The simulation of the field formation in the focal plane was performed using the Richards–Wolf formalism. The diffraction calculation in the near-field diffraction was performed based on the FDTD method, considering the 3D structure of optical elements. The possibility of multiplying the incident beam in different diffraction orders of binary gratings and the polarization transformation associated with spin–orbit interaction at tight focusing were shown. In this case, various polarization transformations were formed in ±1 diffraction orders of the fork grating due to different signs of the introduced vortex-like phase singularity. The obtained results can be useful for the laser processing of materials and surface structuring.

UR - https://www.mendeley.com/catalogue/ab574aa1-6346-31d5-8ed2-8ee8f9f246af/

U2 - 10.3390/photonics11090848

DO - 10.3390/photonics11090848

M3 - Article

VL - 11

JO - Photonics

JF - Photonics

SN - 2304-6732

IS - 9

M1 - 848

ER -