Tight focusing of radially polarized laser pulses (Conference Presentation)

Author(s):  
Tae Moon Jeong ◽  
Sergei BULANOV ◽  
Stefan Weber ◽  
Georg Korn
Author(s):  
A.A. Ilyin ◽  
◽  
K.A. Shmirko ◽  
S.S. Golik ◽  
D.Yu. Proschenko ◽  
...  

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.


2012 ◽  
Vol 21 (2) ◽  
pp. 024101 ◽  
Author(s):  
Jin-Lu Liu ◽  
Zheng-Ming Sheng ◽  
Jun Zheng

Author(s):  
Jérôme Faure ◽  
Neil Zaim ◽  
Diego Guenot ◽  
Ludovic Chopineau ◽  
Adrien Denoeud ◽  
...  

2015 ◽  
Vol 379 (9) ◽  
pp. 857-863 ◽  
Author(s):  
Zhongquan Nie ◽  
Guang Shi ◽  
Dongyu Li ◽  
Xueru Zhang ◽  
Yuxiao Wang ◽  
...  

2013 ◽  
Vol 296 ◽  
pp. 95-100 ◽  
Author(s):  
Jiang Zhao ◽  
Bo Li ◽  
Heng Zhao ◽  
Yi Hu ◽  
Wenjin Wang ◽  
...  

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
C. Mariyal ◽  
P. Suresh ◽  
K. B. Rajesh ◽  
T. V. S. Pillai

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.


2017 ◽  
Vol 25 (26) ◽  
pp. 32475 ◽  
Author(s):  
Chengcheng Ping ◽  
CHunhao Liang ◽  
Fei Wang ◽  
Yangjian Cai

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