Second-Harmonic Generation of Light in Reflection from Media with Inversion Symmetry

1966 ◽  
Vol 16 (22) ◽  
pp. 986-989 ◽  
Author(s):  
N. Bloembergen ◽  
R. K. Chang ◽  
C. H. Lee
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Inversion Symmetry

Optical Second Harmonic Generation Method For Silicon Material Monitoring And Characterization During Ion Implantation And Annealing Processes

1995 ◽  
Vol 406 ◽  
Author(s):  
Y. Gu ◽  
Y. C. Chou ◽  
T. Vu ◽  
K. Yen ◽  
Y. S. Lin ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Second Harmonic Generation ◽  
Thermal Annealing ◽  
Harmonic Generation ◽  
Lattice Structure ◽  
Second Harmonic ◽  
Harmonic Signal ◽  
Inversion Symmetry ◽  
Silicon Material ◽  
Optical Second Harmonic Generation

AbstractNon-linear optical second harmonic generation (SHG) from bulk silicon is very weak because of the inversion symmetry of the silicon lattice structure. However, when silicon material is subjected to the ion implantation and thermal annealing processes, the inversion symmetry will be broken. As a result, the optical second harmonic generation from the material will increase, and the characteristics of the second harmonic signal are related to the material conditions. In this study, we compare SHG results with Transmission Electron Microscope (TEM) observations for silicon material that has been treated with phosphorous ion implantation and rapid thermal annealing, and suggest that the SHG method may be used for the detection and monitoring of impurities and defects during ion implantation and thermal annealing processes.

scholarly journals Electric-Field Switchable Second-Harmonic Generation in Bilayer MoS2 by Inversion Symmetry Breaking

Nano Letters ◽  
2016 ◽  
Vol 17 (1) ◽  
pp. 392-398 ◽  
Author(s):  
J. Klein ◽  
J. Wierzbowski ◽  
A. Steinhoff ◽  
M. Florian ◽  
M. Rösner ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Electric Field ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Inversion Symmetry

SHG in a centrosymmetric crystal – can it be possible?

2021 ◽  
Vol 77 (10) ◽  
pp. 586-590
Author(s):  
Teck Yong Tou ◽  
Seik Weng Ng
Keyword(s):  
Second Harmonic Generation ◽  
Crystal Structures ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Present Report ◽  
Nonlinear Susceptibility ◽  
Inversion Symmetry ◽  
Apparent Contradiction ◽  
Space Groups ◽  
And Inversion

The present report lists selected publications on centrosymmetric compounds that manifest second harmonic generation responses in a laser, along with a few publications that dispute the laser outcomes. Two studies provide a plausible explanation for this apparent contradiction between second-order nonlinear susceptibility and inversion symmetry: the crystals are noncentrosymmetric and are twinned by inversion. If crystal structures of SHG-active compounds are presented in centrosymmetric settings, the authors of the publications may consider stipulating that the true space group is likely to be one of the noncentrosymmetric sub-space groups.

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