The calculation of the diffraction of the laser beams with a phase singularity on the micro-axicons with using high-performance computing

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Savelyev, D.A.^1 ; Khonina, S.N.^2

Samara State Aerospace University Named after Academician S.P. Korolyov, Samara, Russia^1

Image Processing Systems Institute of the RAS, Samara, Russia^2

关键词: Axicons;    Electric field components;    High performance computing;    Incident beams;    Near-field diffraction;    Numerical investigations;    Phase singularities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012213/pdf
DOI  :  10.1088/1742-6596/490/1/012213

来源: IOP

【 摘 要 】

We analyze the diffraction of the laser beam with a vortex phase singularity on the basis of the finite-difference time-domain method (FDTD). It is shown that, when incident beam has phase singularity, increase of the micro-axicon radius leads to extension of the light needle consisting of longitudinal electric field component. The numerical investigations held of the near-field diffraction for the most common and easily implemented types of polarization of the incident beam-linear and circular.