Negative nonlinear refraction obtained with ultrashort laser pulses

被引：13

作者：

Chen, Chen-Wei ^{[1
]}

Tang, Jaw-Luen

Chung, Kuo-Hsiang

Wei, Tai-Huei

Huang, Tzer-Hsiang

机构：

[1] Natl Chung Cheng Univ, Dept Phys, Chiayi 621, Taiwan

[2] Wu Feng Inst Technol, Dept Elect Engn, Chiayi 621, Taiwan

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 11期

关键词：

D O I：

10.1364/OE.15.007006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present nonlinear refraction results for liquids methanol and acetic acid obtained with the Z-scan technique and 28 femtosecond (fs) 800 nm laser pulses. In contrast to the positive lensing effect obtained previously with picosecond and nanosecond laser pulses, a negative lensing effect is observed. The associated mechanism features the third-order polarization arising from the nonlinear response of the molecular skeletal motion that is driven into resonance through its electrostatic coupling to the valence electron cloud distorted by the fs laser field. (C) 2006 Optical Society of America.

引用

页码：7006 / 7018

页数：13

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