Excited State Enhancement Mechanism for Nonresonant Nonlinear Optical Processes

1992 ◽  
Vol 247 ◽  
Author(s):  
J. R. Heflem ◽  
Q. L. Zhou ◽  
D. C. Rodenberger ◽  
Y. M. Cai ◽  
A. F. Garito
Keyword(s):  
Excited State ◽  
Excited States ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Optically Pumped ◽  
Third Harmonic ◽  
Electronic Excited States ◽  
Enhancement Mechanism ◽  
Real Population

ABSTRACTA general enhancement mechanism is discussed for nonlinear optical processes originating from real population of electronic excited states. Enhancement of greater than two orders of magnitude of nonresonant third harmonic generation from an optically pumped s1 electronic excited state is experimentally observed in a conjugated disc-like metallophthalocyanine.

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

Enhanced third-order nonlinear optical responses from optically pumped electronic excited states

1993 ◽  
Author(s):  
Yongming Cai ◽  
Qihou L. Zhou ◽  
Rui-Fang Shi ◽  
M. H. Wu ◽  
D. C. Rodenberger ◽  
...  
Keyword(s):  
Excited States ◽  
Nonlinear Optical ◽  
Optically Pumped ◽  
Third Order ◽  
Electronic Excited States ◽  
Optical Responses

Study of nonlinear optical characteristics of various media by the methods ofz-scan and third harmonic generation of laser radiation

2002 ◽  
Vol 32 (9) ◽  
pp. 781-788 ◽  
Author(s):  
R A Ganeev ◽  
Nataliya V Kamanina ◽  
I A Kulagin ◽  
A I Ryasnyansky ◽  
R I Tugushev ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Third Harmonic Generation ◽  
Optical Characteristics ◽  
Third Harmonic
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