Anisotropic third-order optical nonlinearity of a single ZnO micro/nanowire.
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 π/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.
Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China.
Kai
K
Wang
Jun
J
Zhou
Longyan
L
Yuan
Yuting
Y
Tao
Jian
J
Chen
Peixiang
P
Lu
Zhong Lin
ZL
Wang
D016880:Anisotropy; D007834:Lasers; D053770:Nanowires / Q000737:chemistry*; D017785:Photons; D015034:Zinc Oxide / Q000737:chemistry*
D015034:Zinc Oxide