Anisotropic Third-Order Optical Nonlinearity of a single ZnO Micro/Nanowire
详细信息 查看全文
- 作者：Kai Wang ; Jun Zhou ; Longyan Yuan ; Yuting Tao ; Jian Chen ; Peixiang Lu ; Zhong Lin Wang
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：February 8, 2012
- 年：2012
- 卷：12
- 期：2
- 页码：833-838
- 全文大小：423K
- 年卷期：v.12,no.2(February 8, 2012)
- ISSN：1530-6992
文摘
We report a systematic study about the anisotropic third-order optical nonlinearity of a single ZnO micro/nanowire by using the Z-scan method with a femtosecond laser. The two-photon absorption coefficient and nonlinear refraction index, which are measured as a function of polarization angle and sample orientation angle, exhibit oscillation curves with a period of 蟺/2, indicating a highly polarized optical nonlinearity of the ZnO micro/nanowire. Further studies show that the polarized optical nonlinearity of the ZnO micro/nanowire is highly size-dependent. The results indicate that ZnO nanowire has great potential in applications of nanolasers, all-optical switching and polarization-sensitive photodetectors.