Tight focusing of radially polarized laser pulses (Conference Presentation)

2019 ◽  
Author(s):  
Tae Moon Jeong ◽  
Sergei BULANOV ◽  
Stefan Weber ◽  
Georg Korn
Keyword(s):  
Laser Pulses ◽  
Tight Focusing ◽  
Radially Polarized

Emission of molecular nitrogen at tight focusing of femtosecond laser pulses in air

2021 ◽  
pp. 42-48
Author(s):  
A.A. Ilyin ◽  
◽  
K.A. Shmirko ◽  
S.S. Golik ◽  
D.Yu. Proschenko ◽  
...  
Keyword(s):  
Particle Density ◽  
Molecular Nitrogen ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Plasma Particle ◽  
Sharp Drop ◽  
Radiation Level ◽  
Femtosecond Radiation ◽  
Tight Focusing ◽  
Good Agreement

A numerical model describing the dynamics of plasma particle density upon filamentation of femtosecond radiation in the air is presented. The simulation results are in good agreement with the experimental data. The pumping processes of the N2 and N2+ radiative levels are investigated. The model predicts a sharp drop in electron temperature and density within 1 ns. For the first positive nitrogen system, an excess of the population of the upper radiation level over the population of the lower one is observed for 550 ps.

Electron acceleration by tightly focused radially polarized few-cycle laser pulses

2012 ◽  
Vol 21 (2) ◽  
pp. 024101 ◽  
Author(s):  
Jin-Lu Liu ◽  
Zheng-Ming Sheng ◽  
Jun Zheng
Keyword(s):  
Laser Pulses ◽  
Electron Acceleration ◽  
Radially Polarized

Electron acceleration using radially polarized laser pulses interacting with a plasma mirror

2021 ◽  
Author(s):  
Jérôme Faure ◽  
Neil Zaim ◽  
Diego Guenot ◽  
Ludovic Chopineau ◽  
Adrien Denoeud ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Electron Acceleration ◽  
Radially Polarized

Tight focusing of a radially polarized Laguerre–Bessel–Gaussian beam and its application to manipulation of two types of particles

2015 ◽  
Vol 379 (9) ◽  
pp. 857-863 ◽  
Author(s):  
Zhongquan Nie ◽  
Guang Shi ◽  
Dongyu Li ◽  
Xueru Zhang ◽  
Yuxiao Wang ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Tight Focusing ◽  
Radially Polarized

Tight focusing properties of the azimuthal discrete phase modulated radially polarized LG11⁎ beam

2013 ◽  
Vol 296 ◽  
pp. 95-100 ◽  
Author(s):  
Jiang Zhao ◽  
Bo Li ◽  
Heng Zhao ◽  
Yi Hu ◽  
Wenjin Wang ◽  
...  
Keyword(s):  
Tight Focusing ◽  
Discrete Phase ◽  
Radially Polarized ◽  
Focusing Properties

scholarly journals Partially Coherent, Radially Polarized Beam with Annular Apodization

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
C. Mariyal ◽  
P. Suresh ◽  
K. B. Rajesh ◽  
T. V. S. Pillai
Keyword(s):  
Focal Depth ◽  
Focal Region ◽  
Debye Theory ◽  
Partially Coherent ◽  
Tight Focusing ◽  
Polarized Beam ◽  
Microscopy Techniques ◽  
Radially Polarized ◽  
High Na Lens ◽  
Focusing Properties

Based on the vectorial Debye theory, the tight focusing properties of partially coherent, radially polarized vortex beams are investigated in detail. In this paper, we propose to use an amplitude modulated filter in combination with a high NA lens to generate long focal depth in the focal region. Numerical results show that the generation of long focal depth of FWHM (22.08λ) is achieved, which finds useful application in microscopy techniques such as particle acceleration, laser processing, optical micromanipulation, and beam shaping.

scholarly journals Radially polarized multi-Gaussian Schell-model beam and its tight focusing properties

2017 ◽  
Vol 25 (26) ◽  
pp. 32475 ◽  
Author(s):  
Chengcheng Ping ◽  
CHunhao Liang ◽  
Fei Wang ◽  
Yangjian Cai
Keyword(s):  
Tight Focusing ◽  
Radially Polarized ◽  
Focusing Properties
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