Pulse-doubling perovskite nanowire lasers enabled by phonon-assisted multistep energy funneling  

作　　者：Chunhu Zhao Jia Guo Jiahua Tao Junhao Chu Shaoqiang Chen Guichuan Xing 

机构地区：[1]Hunan Provincial Key Laboratory of Carbon Neutrality and Intelligent Energy,School of Resource&Environment,Hunan University of Technology and Business,410205 Changsha,China [2]Engineering Research Center for Nanophotonics and Advanced Instrument,Ministry of Education,School of Physics and Electronic Science,East China Normal University,200241 Shanghai,China [3]Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macao,999078 Macao,China

出　　处：《Light(Science & Applications)》2024年第8期1645-1654,共10页光（科学与应用)（英文版）

基　　金：support provided by the National Natural Science Foundation of China(Nos.61935017,62175268,62288102,61704057,62274065);the Natural Science Foundation of Shanghai(No.20ZR1417400);the Science and Technology Development Fund,Macao SAR(Nos.FDCT-0082/2021/A2,0010/2022/AMJ,0060/2023/RIA1,0136/2022/A3,006/2022/ALC,EF044/IAPME-HG/2022/MUST);the National Key Research and Development Program of China(No.2019YFB1503402);the Natural Science Foundation of Chongqing(No.cstc2021jcyj-msxmX0786);UM’s research fund(Nos.MYRG2022-00241-IAPME,MYRG-GRG2023-00065-IAPMEUMDF);the research fund from Wuyi University(No.EF38/IAPME-XGC/2022/WYU);the Hunan Provincial Natural Science Foundation of China(No.2023JJ30198);the Excellent Youth Funding of Hunan Provincial Education Department(No.22B0624).

摘　　要：Laser pulse multiplication from an optical gain medium has shown great potential in miniaturizing integrated optoelectronic devices.Perovskite multiple quantum wells(MQWs)structures have recently been recognized as an effective gain media capable of doubling laser pulses that do not rely on external optical equipment.Although the light amplifications enabled with pulse doubling are reported based on the perovskite MQWs thin films,the micronanolasers possessed a specific cavity for laser pulse multiplication and their corresponding intrinsic laser dynamics are still inadequate.Herein,a single-mode double-pulsed nanolaser from self-assembled perovskite MQWs nanowires is realized,exhibiting a pulse duration of 28 ps and pulse interval of 22 ps based on single femtosecond laser pulse excitation.It is established that the continuous energy building up within a certain timescale is essential for the multiple population inversion in the gain medium,which arises from the slowing carrier localization process owning to the stronger exciton–phonon coupling in the smaller-n QWs.Therefore,the double-pulsed lasing is achieved from one fast energy funnel process from the adjacent small-n QWs to gain active region and another slow process from the spatially separated ones.This report may shed new light on the intrinsic energy relaxation mechanism and boost the further development of perovskite multiple-pulse lasers.

关 键 词：doubling ENERGY PHONON 

分 类 号：TN248[电子电信—物理电子学]