Ultrafast dynamics of BixSb1-x film studied by femtosecond pump-probe technique

被引：6

作者：

Wu, Tengfei ^{[1
]}

Zhou, Changhe ^{[1
]}

Jiang, Laixin ^{[2
]}

Zhai, Fengxiao ^{[3
]}

Jia, Wei ^{[1
]}

Fan, Zhongwei ^{[4
]}

机构：

[1] Chinese Acad Sci, Informat Opt Lab, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Key Lab High Power Laser Mat, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[3] Chinese Acad Sci, High Dens Opt Storage Lab, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[4] Beijing GK Laser Technol Co Ltd, Beijing 100085, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2010年 / 283卷 / 21期

基金：

中国国家自然科学基金;

关键词：

Femtosecond pump probe technique; Ultrafast dynamics; BixSb1-x film; CARRIER DYNAMICS; ENHANCEMENT; TRANSITIONS;

D O I：

10.1016/j.optcom.2010.06.089

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The BixSb1-x film is an important phase change material. The ultrafast dynamics of BixSb1-x film is studied by the femtosecond pump-probe technique with an 80 fs pulsed laser. Experimental results show that the reflectivity change increases with the fluence of the pump laser. The fast increase of the reflectivity occurs between 100 and 800 fs. Subsequently, the slower recovery of the reflectivity on a time scale of 1.24-18.3 ps is detected. We also found that the reflectivity change can be greatly affected by the ratio between Bi and Sb composition in BixSb1-x materials with x = 0.2 and 0.88. These experimental results should be helpful for developing new devices with ultrafast dynamics of BixSb1-x film and ultrafast optical switching. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4383 / 4386

页数：4