Acta Optica Sinica, Volume. 35, Issue 3, 319003(2015)
Study on Uniqueness of Experimental Expansion Coefficients for D-p-A Structured Organic Optical Materials
Based on single-beam polarization second-harmonic generation, when polarizations of both initial input beam and second- harmonic output beam are linearly polarized in chiral experimental setup, uniqueness of nonzero experimental fitting expansion coefficients f,g and h related to p + s- polarized second- harmonic signal is reported. The results indicate that for organic optical molecules with D- p- A structured, these experimental expansion coefficients are unique for s- and p±s-polarized initial beams, but they are not unique for p- polarized initial beam, and the simulated results of the p + s- polarized second- harmonic signal can completely explain the contradiction between theory and experiment. To precisely characterize all the secondorder nonlinear susceptibility tensor components of the D- p- A structured materials, it is necessary to avoid using the p-polarized initial beam in a chiral experimental setup.
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Wang Fuxiang, Han Wenwei, Yang Xuwen, Liu Zhengwei, Pan Qinhe. Study on Uniqueness of Experimental Expansion Coefficients for D-p-A Structured Organic Optical Materials[J]. Acta Optica Sinica, 2015, 35(3): 319003
Category: Nonlinear Optics
Received: Sep. 24, 2014
Accepted: --
Published Online: Feb. 12, 2015
The Author Email: Fuxiang Wang (fuxiang_wang@163.com)