面向可见光通信的表面等离激元增强GaN基LED

项目名称： 面向可见光通信的表面等离激元增强GaN基LED

项目编号： No.61504132

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 于治国

作者单位： 中国科学院半导体研究所

项目金额： 20万元

中文摘要： 为实现更快的可见光通信，需要提高GaN基LED的3dB调制带宽。目前普遍采用的提高3dB调制带宽的方法是通过提高工作电流密度的手段降低载流子寿命，但是这一方法对调制带宽的提升能力有限，而且造成不可避免的发光效率降低，导致可见光通信的误码率提高传输距离缩短。本项目拟设计制备出高性能表面等离激元增强GaN基LED，利用表面等离激元出色的场增强特性同时提高调带宽和发光效率，并在此基础上，系统研究表面等离激元增强GaN基LED特有的载流子输运机制、载流子复合机制，探索表面等离激元增强GaN基LED的高频电学特性，以及调制带宽和发光效率随关键外部参数电流密度的变化规律，为实现高速高效可见光通信提供物理指导和解决方案。

中文关键词： GaN基LED；可见光通信；表面等离激元；载流子寿命

英文摘要： To achieve the higher speed visible light communication, we need to improve the 3dB modulation bandwidth of the GaN-based LEDs. Currently, the most popular way to improve the 3dB modulation bandwidth is to reduce the carrier lifetime by increasing the current density. However, this method has very limited ability to improve bandwidth, and will cause inevitable luminous efficiency reduction, leading to the increased BER and shortened transmission distances. This project will fabricate high performance surface plasmon enhanced GaN-based LED to improve 3dB modulation bandwidth and luminous efficiency simultaneously, by using the remarkable field enhancement property of the surface plasmon. On this basis, we will study the carrier transport mechanism and carrier recombination mechanism, explore the high frequency electrical properties of surface Plasmon enhanced GaN-based LED, and the interaction between current density and modulation bandwidth and luminous efficiency. Our project will provide physical guidance and solutions for high speed and high efficiency visible light communication.

英文关键词： GaN-based LED;Visible light communication;Surface plasmon;Carrier Lifetime