Giant third-order nonlinearity of lead and germanium based films in the visible and in the infrared

被引：16
作者：
de Araujo, Cid B. [1 ]
Humeau, A.
Boudebs, G.
Del Cacho, Vanessa D.
Kassab, Luciana R. P.
机构：
[1] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil
[2] Univ Angers, CNRS, UMR 6136, Lab Proprietes Opt Mat & Applicat, F-49045 Angers 01, France
[3] Univ Sao Paulo, Escola Politecn, Dept Engn Sistemas Elect, BR-05508900 Sao Paulo, SP, Brazil
[4] FATEC, Lab Vidros & Datacao, BR-01124060 Sao Paulo, SP, Brazil
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 06期
关键词：
D O I：
10.1063/1.2713944
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The nonlinearity of lead and germanium based films with thickness of 1.5 mu m was studied using a mode-locked picosecond Nd:YAG laser at 1064 nm and its second harmonic at 532 nm. Nonlinear refractive indices of approximate to 10(-16) m(2)/W and two-photon absorption coefficients varying from approximate to 10(2) cm/GW at 1064 nm to approximate to 10(3) cm/GW at 532 nm were measured. The results show that the films have potential applications in optical limiting devices. (c) 2007 American Institute of Physics.
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