Ee Ho-Seok, Kim Sun-Kyung, Kwon Soon-Hong, Park Hong-Gyu
Department of Physics, Korea University, Seoul, South Korea.
Opt Express. 2011 Jan 17;19(2):1609-16. doi: 10.1364/OE.19.001609.
This paper proposes a polarization-selective light emitter that can enhance preferentially the spontaneous emission rate of one desired polarization state using a one-dimensional metal grating mirror. Systematic numerical simulations were performed to determine the optimized structural parameters of the metal grating mirror consisting of ITO/silver, in which the two orthogonally polarized lights reflected from the grating mirror undergo completely opposite phases. This metal grating mirror was incorporated into a GaN medium, and the spontaneous emission rate of one linearly polarized light was 1.3 times higher than that of the other at a specific distance between the light source and mirror. In addition, the polarization ratio can be increased to 15:1 by considering the extracted power in a practical vertical GaN slab light-emitting diode structure. This study will be useful for demonstrating high-efficiency polarization-selective light-emitting diodes without using additional optical components, such as a polarizer.
本文提出了一种偏振选择性发光器，它可以使用一维金属光栅镜优先提高一种所需偏振态的自发发射率。进行了系统的数值模拟，以确定由ITO/银组成的金属光栅镜的优化结构参数，其中从光栅镜反射的两个正交偏振光经历完全相反的相位。将这种金属光栅镜集成到GaN介质中，在光源与镜子之间的特定距离处，一种线偏振光的自发发射率比另一种线偏振光高1.3倍。此外，通过考虑实际垂直GaN平板发光二极管结构中的提取功率，偏振比可提高到15:1。这项研究将有助于在不使用诸如偏振器等额外光学元件的情况下展示高效偏振选择性发光二极管。
