Nonlinear Optical Properties of Silicon Nanocrystals Grown by Using a SiOx/SiO2 Super lattice Approach

被引：0

作者：

Lu, Wei-Jie ^{[1
]}

Zhang, Rong-Jun ^{[1
]}

Cai, Qing-Yuan ^{[1
]}

Zhou, Wei-Xi ^{[1
]}

Zheng, Yu-Xiang ^{[1
]}

Chen, Liang-Yao ^{[1
]}

Zhou, Hui ^{[2
]}

Qian, Shi-Xiong ^{[2
]}

Seo, Se-Young ^{[3
]}

机构：

[1] Fudan Univ, Sch Informat Sci & Engn, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[3] Korea Res Inst Stand & Sci, Div Ind Metrol, Taejon 305340, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2010年 / 56卷 / 04期

关键词：

Silicon nanocrystals; Nonlinear optical properties; Z-scan; ARTIFICIAL DIELECTRICS; SIZE; NANOCLUSTERS;

D O I：

10.3938/jkps.56.1303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The nonlinear optical properties have been studied using the Z-scan technique for silicon nanocrystals embedded in a SiO2 matrix formed by high-temperature annealing of SiOx/SiO2 superlattices grown by thermal evaporation. A mode-locked Ti:sapphire laser system producing 140-fs-long pulses at 800 urn was used as the optical source for the Z-scan measurements. The nonlinear refractive index and the nonlinear absorption coefficient of the silicon nauocrystals were found to be 1.2 x 10(-13) cm(2)/W and 1.5 x 10(-9) cm/W, respectively, and to be strongly enhanced compared to those of bulk silicon. Such enhancement of the nonlinear optical properties is considered to be due to the quantum confinement effect of silicon nanocrystals.

引用

页码：1303 / 1306

页数：4

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