Saturable absorption and reverse saturable absorption in platinum nanoparticles

被引：271
作者：
Gao, YC [1 ]
Zhang, XR
Li, YL
Liu, HF
Wang, YX
Chang, Q
Jiao, WY
Song, YL
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
[3] Heilongjiang Univ, Coll Elect Engn, Harbin 150080, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2005年 / 251卷 / 4-6期
基金：
中国国家自然科学基金;
关键词：
nonlinear absorption; saturable absorption; reverse saturable absorption; nanoparticle; Z-scan;
D O I：
10.1016/j.optcom.2005.03.003
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The optical nonlinear absorption of the aqueous solution of platinum nanospheres protected by poly (N-vinyl-2-pyrrolidone) was investigated using open aperture Z-scan method with nanosecond pulse laser at the wavelength of 532 run. A shift from saturable absorption to reverse saturable absorption was observed at higher input pump intensities. The transition process was analyzed using a phenomenological model based on nonlinear absorption coefficient and saturation intensity. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：429 / 433
页数：5
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