论文摘要
Near-infrared（NIR） solid-state lasers（SSLs） advance the telecommunication, spectroscopy, and biomedical tissue imaging. However, the realization of organic NIR SSLs still remains a great challenge due to the low stimulated emission of narrow-bandgap molecules owing to the difficult establishment of the effective four-level energy system for population inversion and the lack of easily-fabricated high-quality resonator feedback. Herein, through a capillary-bridge confined assembly method, we fabricated organic single-crystal nanowire arrays based on an excited state intramolecular proton transfer（ESIPT）-active organic small molecule. Significantly, the dynamic intramolecular proton transfer within ～50 ps verified the establishment of the four-level energy system and organic single-crystal arrays provide the resonator feedback with high quality factor（Q） of 1940 for NIR lasing due to their optical crystal plane and smooth surface with Rq = 0.3 nm. Consequently, room temperature single-mode 775 nm NIR lasing with a low lasing threshold Pth of 9.9 μJ cm-2 is achieved from the nanowire arrays with the length of L = 10 μm. Our work gives the first demonstration of organic nanolaser arrays over 760 nm, which will boost the practical application of organic coherent light sources at NIR wavelength.
论文目录
文章来源
类型: 国内会议
作者: 王雪东
关键词: 激发态质子转移,四能级体系,微纳晶体,近红外激光,有机半导体
来源: 中国化学会第十六届全国光化学学术讨论会（2019） 2019-10-12
年度: 2019
分类: 基础科学,信息科技
专业: 物理学,无线电电子学
单位: 苏州大学功能纳米与软物质研究院
分类号: TN24
DOI: 10.26914/c.cnkihy.2019.076914
页码: 134
总页数: 1
文件大小: 936k