Nonlinear Optics in Single Crystal Films and Special Device Structures of Selected Organic Materials

这项拟议的研究是先前美国国家科学基金会奖ECS-9634268下的一项计划的更新，该奖项题为“有机材料单晶微结构中的非线性光学”。在这笔资金的资助下，PI成功地使用他开发的“剪切法”制作了单晶有机薄膜。他已经获得了各种尺寸相当大(2平方厘米)的有机薄膜。在这些材料上进行的测量表明，薄膜的二阶极化率很大。这些薄膜的电光系数也显示出比LiNbO4更大的值。因此，他已经展示了一种调制深度为20%的单程电光调制器，它使用了一层3微米厚的DAST单晶膜，在低交流电场下(4 kHz时为1V/um)。拟议的续签计划为期12个月。工作包括继续开发单晶膜以实现大的二阶和三阶光学非线性，在广泛的波长范围内进行详细的光学测量，以及展示高速电光调制器的性能。

The proposed research is a renewal of a program under a prior NSF award ECS-9634268 entitled, "Nonlinear Optics in Single Crystal Microstructure of Organic Materials". Under this grant, the PI has succeeded in making the single crystal organic films using the "shear method" he developed. He has achieved various organic films with fairly large size (2 cm2). Measurements made on these materials have shown large second order susceptibilities for the films. The electro-optic coefficients of these films also show somewhat larger values than that of lithium niobate. As a result he has demonstrated a single-pass elecro-optic modulator with a modulation depth of 20% using a 3-micron thick single crystal film of DAST at low ac field (1V/um at 4 kHz). The proposed renewal program is for a period of 12 months. Work includes continuation of the development of the single crystal film to achieve large second and third order optical nonlinearities, performing detailed optical measurements over a wide wavelength range, and demonstration of high-speed EO modulator performance.