Phosphor-free microLEDs with ultrafast and broadband features for visible light communications

作     者：Zhenhuan Tian Qiang Li Xuzheng Wang Mingyin Zhang Xilin Su Ye Zhang Yufeng Li Feng Yun S.W.Ricky Lee 

作者机构：Shaanxi Provincial Key Laboratory of Photonics&Information TechnologyXi’an Jiaotong UniversityXi’an 710049China Solid-State Lighting Engineering Research CenterXi’an Jiaotong UniversityXi’an 710049China Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina HKUST LED-FPD Technology R&D Center at FoshanFoshan 528200China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2021年第9卷第4期

页      面：452-459页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：Major State Basic Research Development Program of China(2016YFB0400801) National Natural Science Foundation of China(61774121,6190030620) Natural Science Foundation of Shaanxi Province(2020JQ-074) Postdoctoral Research Foundation of China(2019M653640,2019M663718) Fundamental Research Funds for the Central Universities(xjh012019038) 

主　　题：visible features light 

摘      要：Modulation bandwidth and the emission region are essential features for the widespread use of visible light communications(VLC).This paper addresses the contradictory requirements to achieve broadband and proposes ultrafast,asymmetric pyramids grown on adjacent deep concave holes via lateral *** emission with an emission region between 420 nm and 600 nm is obtained by controlling the growth rate at different positions on the same face,which also can provide multiple subcarrier frequency points for the employment of wavelength division multiplexing *** spontaneous emission rate distinction is narrowed by lowering the number of the crystal plane,ensuring a high modulation bandwidth over *** importantly,the residual stress and dislocation density were minimized by employing a patterned substrate,and lateral overgrowth resulted in a further enhancement of the recombination ***,the total modulation bandwidth of multiple subcarriers of the asymmetric pyramids is beyond *** ultrafast,multicolor microLEDs are viable for application in VLC systems and may also enable applications for intelligent lighting and display.