Broadband nonlinear optical properties of red fluorescent carbon dots
Broadband nonlinear optical properties of red fluorescent carbon dots
复制标题
红色荧光碳点的宽带非线性光学特性
DOI：
10.1016/j.rinp.2022.105591
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发表时间：
2022-05-12
影响因子：
5.3
通讯作者：
Meng, Jianqiao
中科院分区：
文献类型：
--
作者：
Fan, Wenxuan;He, Jun;Meng, Jianqiao
碳量子点（CD）为生物成像、传感和生物传感器的应用提供了理想的平台。本文成功合成了一种新型的红色荧光碳点（RCD），并对其宽带非线性光学特性进行了系统的表征。在580，630，650，1064 nm处的RCD的非线性吸收系数（α（NL））值分别为0.65，-3.09，-4.02，和0.14 cm/GW。在近红外区，非线性吸收由饱和吸收转变为双光子吸收。我们展示了应用程序的RCD成像Hela细胞。我们的研究结果表明，具有宽带非线性光学响应的合成RCD在饱和吸收体和深部组织成像方面具有潜在的应用。
Carbon dots (CDs) provide ideal platforms for applications in bioimaging, sensing, and photocatalysis. Herein, a new type of red fluorescent carbon dot (RCD) is successfully synthesized, and its broadband nonlinear optical (NLO) properties are systematically characterized. The nonlinear absorption coefficient (alpha(NL)) values of the RCDs at 580, 630, 650, 1064 nm are 0.65,-3.09,-4.02, and 0.14 cm/GW, respectively. The nonlinear absorption transforms from saturable absorption to two-photon absorption in the near-infrared domain. We demonstrate the application of the RCDs for imaging Hela cells. Our results indicate that the synthesized RCDs with a broadband NLO response exhibit potential applications in saturable absorbers and deep-tissue imaging.