Second-Order Nonlinear Optical Properties of Highly Symmetric Chiral Thin Films

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• 作者：Thierry Verbiest ; Sven Van Elshocht ; André ; Persoons ; Colin Nuckolls ; Karen E. Phillips ; and Thomas J. Katz
• 刊名：Langmuir
• 出版年：2001
• 出版时间：August 7, 2001
• 年：2001
• 卷：17
• 期：16
• 页码：4685 - 4687
• 全文大小：48K
• 年卷期：v.17,no.16(August 7, 2001)
• ISSN：1520-5827

文摘

We demonstrate second-harmonic generation in highly symmetric thin films of chiral molecules. Thefilms were prepared by spin-coating, and no external force (such as electric field poling) was used to inducenoncentrosymmetry. The films have a nonpolar D_n symmetry with second-order susceptibility values of2-9 pm/V. Furthermore, the samples are stable at elevated temperatures.