{"title":"利用声子辅助多步能量漏斗技术实现脉冲倍增的过氧化物纳米线激光器","authors":"Chunhu Zhao, Jia Guo, Jiahua Tao, Junhao Chu, Shaoqiang Chen, Guichuan Xing","doi":"10.1038/s41377-024-01494-2","DOIUrl":null,"url":null,"abstract":"<p>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 micro-nanolasers 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-<i>n</i> QWs. Therefore, the double-pulsed lasing is achieved from one fast energy funnel process from the adjacent small-<i>n</i> 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.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":20.6000,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pulse-doubling perovskite nanowire lasers enabled by phonon-assisted multistep energy funneling\",\"authors\":\"Chunhu Zhao, Jia Guo, Jiahua Tao, Junhao Chu, Shaoqiang Chen, Guichuan Xing\",\"doi\":\"10.1038/s41377-024-01494-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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 micro-nanolasers 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-<i>n</i> QWs. Therefore, the double-pulsed lasing is achieved from one fast energy funnel process from the adjacent small-<i>n</i> 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.</p>\",\"PeriodicalId\":18069,\"journal\":{\"name\":\"Light-Science & Applications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":20.6000,\"publicationDate\":\"2024-07-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Light-Science & Applications\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.1038/s41377-024-01494-2\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Light-Science & Applications","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.1038/s41377-024-01494-2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
摘要
来自光学增益介质的激光脉冲倍增技术在集成光电设备微型化方面显示出巨大的潜力。最近,人们认识到包晶多量子阱(MQWs)结构是一种有效的增益介质,能够使激光脉冲倍增,而无需依赖外部光学设备。虽然基于包晶多量子阱薄膜实现脉冲倍增的光放大技术已有报道,但拥有特定腔体用于激光脉冲倍增的微型激光器及其相应的内在激光动力学仍然不足。本文利用自组装的包晶MQWs纳米线实现了单模双脉冲纳米激光器,在单飞秒激光脉冲激励下,脉冲持续时间为28 ps,脉冲间隔为22 ps。研究证实,在一定时间尺度内持续积累能量对于增益介质中的多重种群反转至关重要,而增益介质中的多重种群反转则源于小n QW 中激子-声子耦合较强导致载流子定位过程减慢。因此,从相邻的小 n QW 到增益有源区的一个快速能量漏斗过程和从空间上分离的小 n QW 到增益有源区的另一个慢速过程实现了双脉冲激光。该报告可能会为本征能量弛豫机制带来新的启示,并推动包晶多脉冲激光器的进一步发展。
Pulse-doubling perovskite nanowire lasers enabled by phonon-assisted multistep energy funneling
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 micro-nanolasers 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.