Nanohole array structured GaN-based white LEDs with improved modulation bandwidth via plasmon resonance and non-radiative energy transfer  

作　　者：RONGQIAO WAN GUOQIANG LI XIANG GAO ZHIQIANG LIU JUNHUI LI XIAOYAN YI NAN CHI LIANCHENG WANG 

机构地区：[1]State Key Laboratory of High Performance Complex Manufacturing,College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China [2]Department of Communication Science and Engineering,Key Laboratory for Information Science of Electromagnetic Waves(MoE),Fudan University,Shanghai 200433,China [3]Semiconductor Lighting Technology Research and Development Center,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [4]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 101408,China

出　　处：《Photonics Research》2021年第7期1213-1217,共5页光子学研究（英文版）

基　　金：National Key Research and Development Program of China (2018YFB0406702);National Natural Science Foundation of China (61925104);Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology),Ministry of Education,Shenzhen;Fundamental Research Funds for the Central Universities of Central South University (2018zzts147)。

摘　　要：Commercial white LEDs (WLEDs) are generally limited in modulation bandwidth due to a slow Stokes process,long lifetime of phosphors,and the quantum-confined Stark effect. Here we report what we believe is a novel plasmonic WLED by infiltrating a nanohole LED (H-LED) with quantum dots (QDs) and Ag nanoparticles(NPs) together (M-LED). This decreased distance between quantum wells and QDs would open an extra non-radiative energy transfer channel and thus enhance Stokes transfer efficiency. The presence of Ag NPs enhances the spontaneous emission rate significantly. Compared to an H-LED filled with QDs (QD-LED),the optimized M-LED demonstrates a maximum color rendering index of 91.2,a 43% increase in optical power at 60 m A,and a lowered correlated color temperature. Simultaneously,the M-LED exhibits a data rate of 2.21 Gb/s at low current density of 96 A∕cm2(60 m A),which is 77% higher than that of a QD-LED. This is mainly due to the higher optical power and modulation bandwidth of the M-LED under the influence of plasmon,resulting in a higher data rate and higher signal-to-noise ratio under the forward error correction.We believe the approach reported in this work should contribute to a WLED light source with increased modulation bandwidth for a higher speed visible light communication application.

关 键 词：TRANSFER RADIATIVE WHITE 

分 类 号：TN312.8[电子电信—物理电子学]