Intense second harmonic generation and long‐range structural ordering in thin films of an organic salt grown by organic vapor phase deposition
Intense second harmonic generation and long‐range structural ordering in thin films of an organic salt grown by organic vapor phase deposition
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有机气相沉积生长的有机盐薄膜中强烈的二次谐波产生和长程结构有序化
DOI：
10.1063/1.115923
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
V. Ban
中科院分区：
文献类型：
--
作者：
S. Forrest;P. Burrows;A. Stroustrup;D. Strickland;V. Ban
研究了有机盐4′-二甲氨基-N-甲基-4-芪唑对甲苯磺酸盐（DAST）薄膜的有机气相沉积（OVPD）新工艺。这些薄膜显示出长程结构有序性和非常强烈的二次谐波产生效率（SHG），其显著高于（当针对厚度归一化时）随机取向的纯DAST粉末。这是第一次证明这种强烈的SHG辐射和非线性有机盐薄膜样品的长程有序。此外，这项工作表明，OVPD代表了一种用于生长高极性非线性光学材料（如DAST）薄膜的通用技术。
We discuss the growth of thin films of the organic salt, 4′‐dimethylamino‐N‐methyl‐4‐stilbazolium tosylate (DAST) by the novel process of organic vapor phase deposition (OVPD). These films show long‐range structural ordering and very intense second harmonic generation efficiencies (SHG) significantly greater (when normalized for thickness) than that of randomly oriented pure DAST powders. This is the first demonstration of such intense SHG radiation and long‐range ordering for a thin film sample of a nonlinear organic salt. Furthermore, this work suggests that OVPD represents a general technique for growing thin films of highly polar, nonlinear optical materials such as DAST.