Impact of light absorption and temperature on self-focusing of zeroth-order Bessel–Gauss beams in a plasma with relativistic–ponderomotive regime
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DOI: 10.1007/s11082-018-1671-1
Abstract: The influence of light absorption and temperature on self-focusing of zeroth-order Bessel–Gauss beams through plasma, with relativistic–ponderomotive regime, is investigated in this paper. The nonlinear differential equation for beam-width is established by using parabolic equation… read more here.
Keywords: temperature self; order bessel; bessel gauss; focusing zeroth ... See more keywords
Features of the Development of the Small-Scale Self-Focusing in Superpower Femtosecond Lasers
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DOI: 10.1007/s11141-020-10029-9
Abstract: The physical reason for the difference between the small-scale self-focusing of nanosecond and femtosecond pulses is that the typical intensity of the latter is three orders of magnitude higher, i.e., TW/cm2 versus GW/cm2. This causes… read more here.
Keywords: femtosecond; self focusing; small scale; scale self ... See more keywords
Enhanced self-focusing of Laguerre-Gaussian laser beam in relativistic plasma under exponential plasma density transition
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DOI: 10.1016/j.cjph.2021.01.003
Abstract: Abstract In the current work, self-focusing of Laguerre-Gaussian laser beam under the influence of exponential plasma density transition in relativistic plasma is studied. It is observed that the spot size of laser beam shrinks as… read more here.
Keywords: plasma density; self focusing; laser beam; laser ... See more keywords
Relativistic self-focusing of finite Airy-Gaussian beams in collisionless plasma using the Wentzel‐Kramers‐Brillouin approximation
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DOI: 10.1016/j.ijleo.2017.10.009
Abstract: Abstract In this paper, we present a preliminary study of relativistic self-focusing of finite Airy-Gaussian beams in collisionless plasma taking into consideration the relativistic nonlinearity in the dielectric constant. The differential equation for the beam… read more here.
Keywords: relativistic self; airy gaussian; finite airy; self focusing ... See more keywords
Exponential plasma density progression based self-focusing of laser in cold quantum plasma
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DOI: 10.1016/j.ijleo.2018.10.192
Abstract: Abstract This manuscript presents the analysis on exponential plasma density progression based self-focusing of the Gaussian laser beam in cold quantum plasma. It is noticed that beam width parameter gets reduced significantly because of the… read more here.
Keywords: quantum plasma; self focusing; plasma density; plasma ... See more keywords
Stronger self-focusing of cosh-Gaussian laser beam under exponential density ramp in plasma with linear absorption
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DOI: 10.1016/j.ijleo.2019.03.005
Abstract: Abstract A theoretical model is purposed which explains propagation of the cosh-Gaussian laser beam in the plasma with exponential density transition. Also the influence of linear absorption on self-focusing of the beam is taken into… read more here.
Keywords: cosh gaussian; laser beam; self focusing; beam ... See more keywords
Surface waves in a thin-film waveguide structure with sharp change in a self-focusing nonlinearity
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DOI: 10.1016/j.ijleo.2020.165668
Abstract: Abstract We consider self-focusing nonlinear optical crystal separated by linear dielectric plate. The nonlinear crystals are characterized by an abruptly changing dielectric permittivity and Kerr nonlinearity coefficients in dependence on electric field amplitude. Two new… read more here.
Keywords: surface; self focusing; nonlinear surface; structure ... See more keywords
Thermo-optic effects mediated self focusing mechanism and optical power limiting studies of ZnO thin films deposited on ITO coated PET substrates by RF magnetron sputtering under continuous wave laser regime
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DOI: 10.1016/j.ijleo.2020.165835
Abstract: Abstract In this work, ZnO thin films are deposited on ITO coated PET substrates employing RF magnetron sputtering technique. The evolution of crystallites orientation on (002) plane with increasing thickness of the films is unveiled… read more here.
Keywords: deposited ito; thin films; ito coated; zno thin ... See more keywords
Self-focusing of CW laser beam with variable radius in rubidium atomic vapor
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DOI: 10.1016/j.optcom.2018.09.026
Abstract: Self-focusing of a cw laser beam in rubidium atomic vapor was studied. The beam power and beam spot size at entrance of a glass cell with the rubidium vapor were variable parameters. A steep grow… read more here.
Keywords: vapor; self focusing; laser beam; focusing laser ... See more keywords
Self-focusing effect on the characteristics of Airy beams
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DOI: 10.1016/j.optcom.2019.02.058
Abstract: Abstract The self-focusing effect on the characteristics of Airy beams is studied, and the physical explanations are also given. It is shown that the self-focusing effect on the self-healing of an Airy beam with the… read more here.
Keywords: airy beams; self focusing; focusing effect; beam ... See more keywords
Self-focusing and pulse sharpening of sub-picosecond laser pulse in n-InSb
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DOI: 10.1016/j.optcom.2020.125266
Abstract: Abstract The self-focusing and pulse sharpening of an intense short pulse laser in n-type indium antimonide, a semiconductor with non-parabolic energy band, is studied. The nonlinearity arises through the dependence of electron effective mass on… read more here.
Keywords: focusing pulse; laser; pulse sharpening; self focusing ... See more keywords