Abstract
Tight Focusing Properties of Circularly Polarized Annular Multi-Gaussian Beam through a Uniaxial Birefringent Crystal
Highlights
In Recent years, focal shaping of tight-focusing of laser beams such as highly confined focal spot/hole with extended focal depth, multiple focal spots, optical bubble etc., has important applications in high-density optical data storage [1], laser micro/nano-processing [2], particle and electron acceleration [3], super-resolution scanning confocal microscopy [4] and optical trapping [5]
We demonstrate the tight focusing properties of circularly polarized annular multi-Gaussian beam through Uniaxial Birefringent Crystal
It is noted from the Figure, that increasing the beam orders m increases the focal depth and reduced the FWHM of the generated focal spot
Summary
In Recent years, focal shaping of tight-focusing of laser beams such as highly confined focal spot/hole with extended focal depth, multiple focal spots, optical bubble etc., has important applications in high-density optical data storage [1], laser micro/nano-processing [2], particle and electron acceleration [3], super-resolution scanning confocal microscopy [4] and optical trapping [5]. And azimuthally polarized vortex beams through a uniaxial crystal system are studied numerically and experimentally [31,32]. Rao Lian-Zhou, et al extends the analysis of tightly focusing circularly polarized vortex beams through uniaxial crystals with small axial birefringence [38]. Murugesan, et al numerically demonstrated that focal structures such as splitting of single focal spot on to multiple spots and focal shift of maximum intensity in the axial direction can be obtained by tightly focused circularly polarized double ring-shaped beam and axial birefringence [39]. We demonstrate the tight focusing properties of circularly polarized annular multi-Gaussian beam through Uniaxial Birefringent Crystal.
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