量子电子学报2017，Vol.34Issue(6)：742-746,5.DOI:10.3969/j.issn.1007-5461.2017.06.014
二维金光栅增强AlGaN/GaN量子阱中红外探测器的垂直光耦合
Vertical optical coupling of AlGaN/GaN quantum well mid-infrared photodetector based on two-dimensional gold grating enhancement
摘要
Abstract
The vertical optical coupling of AlGaN/GaN quantum well mid-infrared photodetector is enhanced by using two-dimensional gold grating structure,which is not sensitive to the polarization of incident light source.The electric field distribution and energy flow in the detector structure are calculated by the finite element method (FEM).It is found that the effective electric field intensity of quantum well with twodimensional gold grating is two orders of magnitude higher than that of Si3N4 grating.It is mainly due to the surface plasmon polariton (SPP) excited at the interface of gold grating and AlGaN,which strongly changes the direction of light energy flow and electric field vibration.No matter how the light source polarization is,when the vertical incident electromagnetic wavelength is 4.7 μm,electric field intensity E is 1 V/m,the effective |Ez|2 in quantum well region reaches 0.7 (V/m)2,which provides a solution to realize the focal plane array of AlGaN/GaN quantum well mid-infrared photodetector.关键词
光电子学/二维金光栅/有限元法/表面等离激元/AlGaN/GaN量子阱中红外光电探测器Key words
optoelectronics/two-dimensional gold grating/finite element method/surface plasmon polariton/AlGaN/GaN quantum well mid-infrared photodetector分类
信息技术与安全科学引用本文复制引用
彭飞..二维金光栅增强AlGaN/GaN量子阱中红外探测器的垂直光耦合[J].量子电子学报,2017,34(6):742-746,5.基金项目
Supported by National Natural Science Foundation of China(国家自然科学基金,11574166),Natural Science Foundation of Jiangsu Higher Education Institutions of China(江苏省高校自然科学研究重大项目资助,14KJA510005) （国家自然科学基金,11574166）
