The local optical anisotropy of 1D semiconductor nanorods (NRs), which results in anisotropic absorption and polarized emission, is important for various applications. Thin films of photoaligned, oriented NRs offer not only polarized emission but also anisotropic absorption at the macroscopic scale. Based on this anisotropic absorption, two kinds of optically addressable photoemissive displays are presented, which employ polarized backlight in combination with a liquid crystal (LC) based polarization rotator to control the down conversion emission intensity of a photoaligned NR/liquid crystal polymer (LCP) composite film. The first alternative “fixed information display” utilizes pattern aligned NRs, with an orthogonal easy axis in two domains, resulting in optical contrast in neighboring domains. The second option “random information display” employs unidirectionally aligned NR films as a projection screen to display any information coded by a LC cell. It is also shown that the NR/LCP composite film can align LC in bulk, and therefore, can be integrated into a LC cell, fabricating a robust photoemissive NR display device.

中文翻译：

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用于显示应用的液晶薄膜中的光学可寻址光取向半导体纳米棒

一维半导体纳米棒（NRs）的局部光学各向异性，导致各向异性的吸收和极化发射，对于各种应用非常重要。光取向取向NR的薄膜不仅提供偏振发射，而且在宏观尺度上还提供各向异性吸收。基于这种各向异性吸收，提出了两种光学可寻址的光电发射器，它们采用偏振背光与基于液晶（LC）的偏振旋转器相结合，以控制光取向NR /液晶聚合物（LCP）的下转换发射强度复合膜。第一种替代方法“固定信息显示”利用图案对齐的NR，在两个域中具有正交的易轴，从而在相邻域中产生光学对比度。第二种选择“随机信息显示”采用单向排列的NR胶片作为投影屏幕，以显示由LC单元编码的任何信息。还显示出，NR / LCP复合膜可以整体地对准LC，并且因此可以被集成到LC单元中，从而制造出坚固的光发射NR显示装置。