Formation of Photonic Structures in Photorefractive Lithium Niobate by 1D and 2D Bessel-like Optical Fields

Photorefractive Photonics 2017

Inyushov, A.^1 ; Safronova, P.^1 ; Trushnikov, I.^1 ; Sarkyt, A.^1 ; Shandarov, V.^1

Tomsk State University of Control Systems and Radioelectronics, Lenin Prospect 40, Tomsk

634050, Russia^1

关键词: Beam cross section;    Bessel-like beams;    Diffraction structures;    Gaussian laser beam;    Monochromatic light;    Nonlinear photonics;    Photonic structure;    Two Dimensional (2 D);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/867/1/012023/pdf
DOI  :  10.1088/1742-6596/867/1/012023

来源: IOP

【 摘 要 】

Both, one-dimensional (1D) and two-dimensional (2D) Bessel-like beams with different topology of 2D beam cross-sections are formed from Gaussian laser beams using the amplitude masks and Fresnel biprisms. These almost diffraction-free light fields with wavelengths of 532 and 633 nm can change the refractive indices of photorefractive lithium niobate samples and form within them the nonlinear photonic diffraction structures. The characteristics of photonic structures induced in this way are studied by diffraction of monochromatic light with wavelengths of 633 and 532 nm.