Surface plasma wave assisted second harmonic generation of laser over a metal film

2015 ◽  
Vol 22 (1) ◽  
pp. 013111 ◽  
Author(s):  
Santosh Chauhan ◽  
J. Parashar
Keyword(s):  
Second Harmonic Generation ◽  
Plasma Wave ◽  
Harmonic Generation ◽  
Metal Film ◽  
Second Harmonic ◽  
Surface Plasma

scholarly journals Second Harmonic Generation Induced by Surface Plasma Wave on Metallic Surface in the Presence of Wiggler Magnetic Field

2021 ◽  
Author(s):  
Harleen Kaur Dua ◽  
Niti Kant ◽  
Vishal Thakur
Keyword(s):  
Magnetic Field ◽  
Second Harmonic Generation ◽  
Plasma Wave ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Attenuated Total Reflection ◽  
Metallic Surface ◽  
Surface Plasma ◽  
Semiconductor Interface ◽  
Wiggler Magnetic Field

Abstract Under the influence of wiggler magnetic field, the phenomenon of second harmonic generation at the metal-semiconductor interface, induced by surface plasma wave (SPW) has been investigated. Metals like Cu, Ag and Al, each with a thin layer of n-InSb over it, are considered for our study. Laser light is incident on metal layered on glass prism in attenuated total reflection Kretschmann configuration (ATR) which generates SPW. The SPW further interacts nonlinearly with the electrons of n-type semiconductor layered over the metal, leading to second harmonic generation (SHG). The presence of an external wiggler magnetic field makes the process resonant and helps in phase matching. Relatively more enhancement in the amplitude of the second harmonic is observed for Cu-InSb as compared to Ag-InSb and Al-InSb. Numerical analysis shows that the enhancement in the amplitude of SHG increases with the wiggler magnetic field.

scholarly journals Second-harmonic generation by a chirped laser pulse with the exponential density ramp profile in the presence of a planar magnetostatic wiggler

2019 ◽  
Vol 37 (4) ◽  
pp. 442-447 ◽  
Author(s):  
Niti Kant ◽  
Arvinder Singh ◽  
Vishal Thakur
Keyword(s):  
Laser Pulse ◽  
Second Harmonic Generation ◽  
Lorentz Force ◽  
Plasma Wave ◽  
Plasma Density ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Self Focusing ◽  
Chirped Laser Pulse

AbstractSecond-harmonic generation of the relativistic self-focused chirped laser pulse in plasma has been studied with the exponential plasma density ramp profile in the presence of a planar magnetostatic wiggler. It is evident that the exponential plasma density ramp is helpful in enhancing second-harmonic generation as, with the introduction of the exponential plasma density ramp, self-focusing becomes stronger and hence, it leads to enhance the harmonic generation of the second order in the plasma. Also, it is observed that the efficiency of second-harmonic generation enhances significantly with an increase in the value of the chirp parameter. Further, the magnetostatic wiggler helps in enhancing the harmonic generation of the second order. This is due to the fact that dynamics of the oscillating electrons is altered due to the Lorentz force which, in turn, modifies the plasma wave and, hence, results in the efficient second-harmonic generation.

Plasma wave and second harmonic generation

1978 ◽  
Vol 20 (8) ◽  
pp. 825-835 ◽  
Author(s):  
M S Sodha ◽  
J K Sharma ◽  
D P Tewari ◽  
R P Sharma ◽  
S C Kaushik
Keyword(s):  
Second Harmonic Generation ◽  
Plasma Wave ◽  
Harmonic Generation ◽  
Second Harmonic

Modulation of Second-Harmonic Generation in Bulk MoS2 via Excitation Wavelength and Metal Film Thickness

2020 ◽  
Vol 49 (6) ◽  
pp. 3761-3769 ◽  
Author(s):  
Jianhua Zeng ◽  
Yiping Peng ◽  
Weicheng Li ◽  
Shijie Huang ◽  
Yanlin Zhan ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Film Thickness ◽  
Harmonic Generation ◽  
Metal Film ◽  
Second Harmonic ◽  
Excitation Wavelength ◽  
Bulk Mos2

scholarly journals Self-focusing of laser beam in collisional plasma and its effect on Second Harmonic generation

2011 ◽  
Vol 29 (4) ◽  
pp. 407-414 ◽  
Author(s):  
Arvinder Singh ◽  
Keshav Walia
Keyword(s):  
Second Harmonic Generation ◽  
Laser Beam ◽  
Plasma Wave ◽  
Plasma Density ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Collisional Plasma ◽  
Self Focusing ◽  
Beam Plasma ◽  
Non Linear

AbstractThis paper presents an investigation of self-focusing of Gaussian laser beam in collisional plasma and its effect on second harmonic generation. Due to non-uniform heating, collisional non-linearity arises, which leads to redistribution of carriers and hence affects the plasma wave, which in turn affects the second harmonic generation. Effect of the intensity of the laser beam/plasma density on the harmonic yield is studied in detail. We have set up the non-linear differential equations for the beam width parameters of the main beam, plasma wave, second harmonic generation and second harmonic yield by taking full non-linear part of the dielectric constant of collisional plasma with the help of moment theory approach. It is predicted from the analysis that harmonic yield increases/decreases due to increase in the plasma density/intensity of the laser beam respectively.

scholarly journals Second-harmonic generation by relativistic self-focusing of cosh-Gaussian laser beam in underdense plasma

2015 ◽  
Vol 34 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Arvinder Singh ◽  
Naveen Gupta
Keyword(s):  
Differential Equation ◽  
Second Harmonic Generation ◽  
Laser Beam ◽  
Plasma Wave ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Spot Size ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Underdense Plasma

AbstractThis paper presents theoretical investigation of effect of relativistic self-focusing of cosh-Gaussian (ChG) laser beam on second-harmonic generation in an underdense plasma. Steep transverse density gradients are produced in the plasma by the electron plasma wave excited by relativistic self-focusing of ChG laser beam. The generated plasma wave interacts with the pump beam to produce its second harmonics. Following Jeffrey Wentzel Kramers Brillouin (J.W.K.B) approximation and moment theory the differential equation governing the evolution of spot size of laser beam with distance of propagation has been derived. The differential equation so obtained has been solved numerically by the Runge–Kutta method to investigate the effect of decentered parameter, intensity of laser beam as well as density of plasma on self-focusing of the ChG laser beam, and generation of its second harmonics. It has been observed that the peak intensity of the laser beam shifts in the transverse direction by changing the decentered parameter and a noticeable change is observed on focusing of the laser beam as well as on conversion efficiency of second harmonics.

Second-Harmonic Generation from a Magnetic Buried Interface Enhanced by an Interplay of Surface Plasma Resonances

ACS Photonics ◽  
2015 ◽  
Vol 2 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Ilya Razdolski ◽  
Sergii Parchenko ◽  
Andrzej Stupakiewicz ◽  
Sergey Semin ◽  
Alexander Stognij ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Surface Plasma
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