Second-order optical nonlinearity of TiO2 nanocrystals studied by hyper-Rayleigh scattering

摘要：

Incoherent second harmonic generation (SHG) or hyperRayleigh scattering (HRS) technique was used to measure for the first-order hyperpolarizability (β) of TiO2 nanocrystals (10 nm mean diameter)of centrosymmetric materials which are electric dipole forbidden for HRS. Results show per TiO2 particle β value is 1.4x10-27 esu and per TiO2 formula unit β value is 0.09x10-30 esu which is very small compared to that of the nanocrystals of noncentrosymmetric materials reported previously, attributed to the absence of nanoerystal core contribution and resonance enhancement.

关键词： TiO2 nanocrystals Hyper-Rayleigh scattering Second-order optical nonlinearity

作者: Zhanhui Liu Yanan Zhang Fei Xu

作者单位: College of Mathematics & Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China

会议类型: 国际会议

会议名称: 2010 International Conference on Application of Mathematics and Physics(2010国际数理科学与气象学术研讨会暨2010空间天气学研讨会 AMP2010)

会议地点: 南京

会议语种:英文

页码: 344-348

在线出版日期: 2010-05-08（万方平台首次上网日期，不代表论文的发表时间）