Investigation of the phase of the second-order susceptibility measured in off-resonant surface second-harmonic generation

1999 ◽  
Vol 68 (3) ◽  
pp. 321-323 ◽  
Author(s):  
F. Hache ◽  
S.K. Andersson ◽  
M.-C. Schanne-Klein ◽  
C. Flytzanis
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Order Susceptibility

Moving media: Second harmonic generation investigation

2016 ◽  
Vol 30 (22) ◽  
pp. 1650138
Author(s):  
Mahboubeh Ghalandari
Keyword(s):  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Phase Matching ◽  
Nonlinear Media ◽  
Quasi Phase Matching ◽  
Moving Media ◽  
Order Susceptibility

Because of the importance of second harmonic generation (SHG) in some nonlinear media, in this paper, we investigated induced SHG in diamond where there is no intrinsic second-order susceptibility, [Formula: see text]. The electric field is proposed to introduce moving susceptibility of the second-order and induce second harmonic generation. Then, spatiotemporal quasi-phase matching (QPM) is applied to optimize the induced SHG. Numerical results reveal that in this way, the induced second harmonic is found at the frequency of [Formula: see text] rather than [Formula: see text].

Bulk and surface contributions to second-order susceptibility in crystalline and porous silicon by second-harmonic generation

2001 ◽  
Vol 481 (1-3) ◽  
pp. 105-112 ◽  
Author(s):  
M. Falasconi ◽  
L.C. Andreani ◽  
A.M. Malvezzi ◽  
M. Patrini ◽  
V. Mulloni ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Second Order ◽  
Order Susceptibility

scholarly journals Non-Linear Optical Effects in Au Nanoparticle-Deposited ZnO Nanocrystalline Films

2008 ◽  
Vol 2 ◽  
pp. 31-38 ◽  
Author(s):  
Katarzyna Ozga ◽  
Toshiyuki Kawaharamura ◽  
Akrajas Ali Umar ◽  
Munetaka Oyama ◽  
Andrzej Slezak ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Glass Substrate ◽  
Second Harmonic ◽  
Second Order ◽  
Au Nanoparticle ◽  
Nanocrystalline Films ◽  
Yag Laser ◽  
Optical Effects ◽  
Order Susceptibility

Applying a bicolor coherent treatment of a Nd-YAG laser with wavelength 1.32 μm and its second harmonic generation, we have investigated photoinduced SHG in Au nanoparticledeposited ZnO nanocrystallinne (NC) films. We have established that coexistence of the such crystallites gives substantially better results compared to the pure ZnO NC deposited onto the glass substrate. It was shown that the value of the second order susceptibility obtained for the large incident angles of the fundamental and writing beams is equal to about 23 pm/V. The better results are obtained during the phototreatment at temperatures near the 60 oC for the Au doped samples and is almost non-sensitive to temperature for the pure samples. The further increase of the temperature leads to decay of the optical second harmonic generation

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.

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