.png){kind=icon}
返回
Multiexcitonic Lasing in Thin-Shell Colloidal Quantum Dot Supraparticles
.png){kind=icon}
OA
AI
DOI：10.1021/acsphotonics.5c02304.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Self-assembled supraparticles (SPs) of colloidal semiconductor nanocrystals act as solution-processable microlasers, where optical gain couples to whispering-gallery modes supported by the microspherical cavity. Here, multicolor lasing is demonstrated from SPs composed of standard-size (5.5–6.5 nm), graded thin-shell CdSxSe1–x/ZnS quantum dots (QDs) by exploiting their electronic transitions. While lasing from higher-order states typically requires engineered thick-shell QDs, we achieve this using conventional thin-shell QDs through composite SPs that integrate two QD populations: one with an absorption edge above the pump wavelength (625 nm) and another with an edge near (540 nm) or below (450 nm) the pump (532 nm). At low pump fluence, lasing occurs in the red region (2.00–2.04 eV) from 1S transitions. With increased fluence, lasing shifts to the yellow region (2.14–2.18 eV), arising from 1P transitions. This fluence-controlled red-to-yellow shift establishes composite SPs as a versatile platform for tunable, multicolor microlasers based on standard-sized QDs.
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
6.7
论文数:
5.6K
被引数:
2.5W
机构
引用论文
.png){kind=icon}
分享收藏分享收藏Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
PREAI
分享收藏
Colloidal Semiconductor Quantum Well Supraparticles as Low-Threshold and Photostable MicrolasersOAAI
OAAI分享收藏
查看更多内容