Cubic Nonlinearity of Tellurite and Chalcogenide Glasses: Terahertz-Field-Induced Second Harmonic Generation vs. Optical Kerr Effect

被引：2
|
作者：
Bodrov, Sergey [1 ,2 ]
Sergeev, Yuriy [1 ]
Burova, Ekaterina [2 ]
Korytin, Aleksey [1 ]
Murzanev, Aleksey [1 ]
Romashkin, Alexander [1 ]
Stepanov, Andrey [1 ]
机构：
[1] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia
[2] Univ Nizhny Novgorod, Dept Gen Phys, Nizhnii Novgorod 603022, Russia
来源：
APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 22期
关键词：
tellurite glasses; chalcogenide glasses; third-order nonlinearity; terahertz pulses; second harmonic generation; optical Kerr effect; z-scan; REFRACTIVE-INDEX; ELECTRIC-FIELD; SILICA; SUSCEPTIBILITIES; ULTRAVIOLET; DEPENDENCE; FIBERS; GASES; AS2S3;
D O I：
10.3390/app122211608
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Third-order nonlinear susceptibilities chi((3))(-2 omega;omega,omega,0) and chi((3))(-omega;omega,-omega,omega) responsible for electric-field-induced second harmonic generation and the optical Kerr effect were measured and directly compared for tellurite and chalcogenide glasses. The nonlinear coefficients were found by measuring the second harmonic radiation from samples under the action of an external field of terahertz pulses and by the classical z-scan technique, respectively. The influence of ambient air and helium gas on second harmonic generation was analyzed. It was demonstrated that both susceptibilities chi((3))(-2 omega;omega,omega,0) and chi((3))(-omega;omega,-omega,omega) have close absolute values, which shows the dominant role of nonresonant electronic nonlinearity in the studied glasses.
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页数：14
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