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| 1 | Low-threshold and narrow-emission random lasing in a self-assembly TiN nanoparticle-doped carbon quantum dot/DCM nanowire composite显示文摘The random lasing in quantum dot systems is in anticipation for widespread applications in biomedical therapy and image recognition,especially in random laser devices with high brightness and high monochromaticity.Herein,low-threshold,narrowband emission,and stable random lasing is realized in carbon quantum dot(CQD)/DCM nanowire composite-doped TiN nanoparticles,which are fabricated by the mixture of carbon quantum dots and self-assembly DCM dye molecules.The F?rster resonance energy transfer process results in a high luminescence efficiency for the composite of carbon dots and DCM nanowires,allowing significant random lasing actions to emerge in CQD/DCM composite as TiN particles are doped that greatly enhance the emission efficiency through the plasmon resonance and random scattering.Thus,sharp and low-threshold random lasing is finally realized and even strong single-mode lasing occurs under higher pumping energy in the TiN-doped CQD/DCM composite.This work provides a promising way in high monochromaticity random laser applications. | JING LYU XINYU ZHANG LEI CAI LI TAO WEIFENG MA AN LI YE TIAN YUNSONG YIN DENAN KONG WEN YI XIANSHUANG WANG RUIBIN LIU | 2022 | Photonics Research2022，10，9： | 0 |
| 2 | 回音壁激光的单模式调控方法研究进展显示文摘回音壁模式微腔因模式体积小、超高Q值和低阈值的优点得到了广泛的关注,但是在旋转对称的回音壁微腔中会产生多纵模激光辐射,并且辐射的方向性较差,在实际应用中受到限制,寻求有效方法实现回音壁激光的单模辐射是微腔激光器走向实际应用的关键问题。本综述重点阐述了近年来回音壁激光单模调控的几种方法,包括减小腔体尺寸、外加选模结构、基于游标效应、基于宇称时间对称性破缺、变形微腔等,并对单模回音壁激光的发展前景进行了展望。通过本综述以期为相关领域研究人员提供参考,深入理解回音壁激光单模调控的物理机理。 | 刘硕 王宇琛 王秀华 侯睿 | 2023 | 物理学进展2023，43，4： | 0 |
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