| GaAs-SiO_2复合薄膜的非线性光学特性 |
| |
| 引用本文： | 欧阳艳东 石旺舟. GaAs-SiO_2复合薄膜的非线性光学特性[J]. 汕头大学学报(自然科学版), 1998, 13(1): 8-12 |
| |
| 作者姓名： | 欧阳艳东 石旺舟 |
| |
| 作者单位： | 汕头大学物理学系!汕头，515063，汕头大学物理学系!汕头，515063 |
| |
| 摘 要： | 采用单光束Z扫描技术测量了GaAs－SiO2复合薄膜的光吸收和光折射特性，结果表明：在104W／cm2的辐射光强作用下，复合薄膜的光吸收和光折射表现出明显的非线性特征．根据Z扫描测量理论算得三阶非线性折射率系数和非线性光吸收系数分别为10-6cm2／W；和10-1cm／W量级．运用量子点模型对三阶光学非线性响应增强的机制进行了讨论．
|
| 关 键 词： | GaAs SiO_2 纳米复合薄膜 非线性光学特性 |
Nonlinear optical characteristics of composite GaAs-SiO_2 film |
| |
| Ouyang Yandong,Shi Wangzhou. Nonlinear optical characteristics of composite GaAs-SiO_2 film[J]. Journal of Shantou University(Natural Science Edition), 1998, 13(1): 8-12 |
| |
| Authors: | Ouyang Yandong Shi Wangzhou |
| |
| Affiliation: | Department of Physics. Shantou University. Shantou. 515063 |
| |
| Abstract: | Optical absorptive and refractive indexes of nanocrystalline GaAs-inlaid SiO2film were measured by single-beam Z-scanning technigue. Under the action of radioactive light in the order of 104W/cm2, obvious optical nonlinearity was observed in the optical absorptive and refractive indexes of the composite film. In accordance with the measurement theory of Z-scanning, the third-order nonlinear refraction rate coefficient and nonlinear absorption coefficient were calculated at the order of 10-6cm2/W and 10-1cm/W respectively. The mechanism for the response enhancement of the third-order optical nonlinearity was discussed by applying the quantum dot model. |
| |
| Keywords: | GaAs SiO_2 nanocrystalline composite film nonlinear optical characteristic |
| 本文献已被 CNKI 维普 等数据库收录！ |
