Kim Young-Bin, Hwang Dae-Woong, Moon Yoon-Jong, Kim Sun-Kyung
Appl Opt. 2018 Dec 10;57(35):10271-10275. doi: 10.1364/AO.57.010271.
One-dimensional metal/dielectric subwavelength periodic patterns have dielectric or metallic material dispersions depending on the polarization of incident light. This feature enables the development of artificial, ultrathin, birefringent films. In this study, we report polarization-sensitive beam steering from quantum emitters coupled with one-dimensional metal/dielectric metamaterial films. Electromagnetic simulations show that an Al/ITO metamaterial film functioning as a quarter-wave plate leads to vertically directed radiation for one polarization and a saddle-shaped, diverging radiation pattern for the orthogonal polarization. The strategy studied herein is extended to achieve polarized, vertically directed emission from organic light-emitting diodes. A tailored Al/ITO metamaterial mirror yields an approximately 30-fold improvement in polarization ratio, in conjunction with polarization-dependent Purcell factor enhancement.
一维金属/电介质亚波长周期性图案根据入射光的偏振具有电介质或金属材料色散。这一特性使得人工超薄双折射薄膜的开发成为可能。在本研究中，我们报告了与一维金属/电介质超材料薄膜耦合的量子发射器的偏振敏感光束转向。电磁模拟表明，用作四分之一波片的Al/ITO超材料薄膜会导致一种偏振的垂直定向辐射和正交偏振的鞍形发散辐射图案。本文研究的策略被扩展以实现有机发光二极管的偏振垂直定向发射。定制的Al/ITO超材料反射镜在提高偏振比的同时，还伴随着与偏振相关的珀塞尔因子增强，偏振比提高了约30倍。
