Broadband nonlinear optical properties of red fluorescent carbon dots

Wenxuan Fan; Jun He; Hao Wei; Chen Zhang; Menglong Zhu; Defeng Xu; Si Xiao; Jiangling He; Zhihui Chen; Jianqiao Meng

Results in Physics (Jul 2022)

Broadband nonlinear optical properties of red fluorescent carbon dots

Wenxuan Fan,
Jun He,
Hao Wei,
Chen Zhang,
Menglong Zhu,
Defeng Xu,
Si Xiao,
Jiangling He,
Zhihui Chen,
Jianqiao Meng

Affiliations

Wenxuan Fan: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Jun He: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Hao Wei: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Chen Zhang: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Menglong Zhu: Department of Applied Physics, School of Microelectronics and Physics, Hunan University of Technology and Business, Changsha 410205, PR China
Defeng Xu: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Si Xiao: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China
Jiangling He: National R&D Center for Se-rich Agricultural. Products Processing, Hubei Engineering Research Center for Deep Processing of Green Se-rich Agricultural Products, School of Modern, Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China; Corresponding authors.
Zhihui Chen: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China; Corresponding authors.
Jianqiao Meng: Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, PR China; Corresponding authors.

Journal volume & issue: Vol. 38
p. 105591

Abstract

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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 (αNL) 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.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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