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

doi:10.1088/1674-1056/19/11/114208

Abstract 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.

Keywords: circular dichroism three-coupled-oscillator model tripod-like structure second-harmonic generation circular dichroism

Received: 23 February 2010
Revised: 11 April 2010
Accepted manuscript online:

PACS:	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	78.20.Fm	(Birefringence)
	78.66.-w	(Optical properties of specific thin films)

Fund: Project supported by the excellent Team in Harbin Institute of Technology, China, and the Natural Science Foundation of Heilongjiang Province, China (Grant No. A200406).

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Wang Xiao-Ou(王晓鸥), Chen Li-An(陈立安), Chen Li-Xue(陈历学), Sun Xiu-Dong(孙秀冬), Li Jun-Qing(李俊庆), and Li Chun-Fei(李淳飞) Second-harmonic generation circular dichroism spectroscopy from tripod-like chiral molecular films 2010 Chin. Phys. B 19 114208

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

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