基于有机异质耦合微腔的双波长可切换单模激光  

Dual-wavelength-switchable single-mode lasers based on organic heterogeneously-coupled microcavities

作　　者：贾雅君 张春焕 管雨薇 刘珍 呼凤琴 Yajun Jia;Chunhuan Zhang;Yuwei Guan;Zhen Liu;Fengqin Hu(College of Chemistry,Beijing Normal University,Beijing 100875,China;Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]北京师范大学化学学院,北京100875 [2]中国科学院化学研究所,光化学重点实验室,北京100190

出　　处：《中国科学：化学》2022年第6期972-979,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21973007,51903238)资助项目。

摘　　要：微纳激光器因在超灵敏化学、生物传感和光信息处理等领域具有广泛的应用前景而备受关注.由于增益饱和及空间烧孔效应造成的激光多模式会导致时序脉冲展宽和伪信号的产生,限制了激光器的应用,而单模激光可以有效解决这些问题.目前,研究者们提出的单模激光调制策略大多需要对结构进行精确加工,而能够在同一器件中实现动态可切换的多色单模激光输出仍是一个很大的挑战.本工作中,我们采用喷墨打印法制备了掺有不同增益介质的有机微腔,通过控制柔性基底的拉伸程度实现对异质耦合微腔耦合强度的控制,实现了波长可切换的双波长单模激光出射.这些结果加深了人们对异质耦合腔系统中激光调制机理的理解,并为构建可用于光学集成中的多功能小型化激光器提供了思路.Micro/nanoscale lasers have attracted great interest because of their promising applications ranging from ultrasensitive chemical and biological sensing to optical information processing. Due to the inhomogeneous gain saturation introduced by spatial hole burning, most micro/nanoscale lasers are subject to operation in multimodes, which will lead to temporal fluctuations and false signaling. As a result, the practical applications of lasers are restricted.Single-mode lasers can effectively solve these problems. Currently, most of the single-mode laser modulation strategies require precisely processing the microstructures. However, it is still a great challenge to realize dynamically switchable multicolor single-mode laser output in the same device. In this work, we fabricated organic microcavities doped with different gain media using inkjet-printing method. Controlling the coupling strength of the heterogeneously coupled microcavity is achieved by controlling the stretching degree of the flexible substrate, through which a wavelengthswitchable dual-wavelength single-mode laser emission is realized. These results deepen the understanding of the lasing modulation mechanism in heterogeneously coupled cavity systems and offer a route to build multifunctional and miniaturized lasers for photonic integrations.

关 键 词：有机微纳激光器 单模激光 异质耦合微腔 喷墨打印 

分 类 号：TN248[电子电信—物理电子学]