Second-harmonic generation circular dichroism spectroscopy from tripod-like chiral molecular films

• 来源期刊: 中国物理B（英文版）
• 关键词: circular dichroism three-coupled-oscillator model tripod-like structure second-harmonic generation circular dichroism
• 年，卷（期）: 2010,（11）
• 页码范围: 427-435
• 页数: 9页
• 语种: 英文

摘要

The second-harmonic generation(SHG)circular dichroism in the light of reflection from chiral films of tripod-like chiral molecules is investigated.The expressions of the second-harmonic generation circular dichroism are derived from our presented three-coupled-oscillator model for the tripod-like chiral molecules.Spectral dependence of the circular dichroism of SHG from film surface composed of tripod-like chiral molecules is simulated numerically and analysed.Influence of chiral parameters on the second-harmonic generation circular dichroism spectrum in chiral films is studied.The result shows that the second-harmonic generation circular dichroism is a sensitive method of detecting chirality compared with the ordinary circular dichroism in linear optics.All of our work indicates that the classical molecular models are very effective to explain the second-harmonic generation circular dichroism of chiral molecular system.The classical molecular model theory can give us a clear physical picture and brings us very instructive information about the link between the molecular configuration and the nonlinear processes.