CARBON6 9 2 0 1 4
CARBON
6 9 ( 2 0 1 4 ) 6 3 8 –6 4 0
Available at www.sciencedirect.com
ScienceDirect journal homepage: www.elsevier.com/locate/carbon
Letter to the Editor
Carbon nanodots with strong nonlinear optical response Dezhi Tan a, Yuya Yamada b, Shifeng Zhou c, Yasuhiko Shimotsuma b, Kiyotaka Miura b,
Jianrong Qiu a,c,* a State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou,
Zhejiang 310027, PR China b Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan c State Key Laboratory of Luminescence Materials and Devices and the Institute of Optical Communication Materials, South China University of Technology, Guangzhou, Guangdong 510640, PR China
A R T I C L E I N F O
A B S T R A C T
Article history:
The carbon nanodots (CNDs) were synthesized by a simple method of femtosecond laser
Received 14 November 2013
ablation of bagasse in ethanol. Strong optical limiting effects of as-prepared CNDs to
Accepted 19 December 2013
800 nm femtosecond laser pulses were observed with the threshold of 74 mJ/cm2. The
Available online 26 December 2013
strong two photon absorption of CNDs is responsible for the optical limiting response.
The nonlinear coefficient was determined by the open-aperture Z-scan technique.
Ó 2013 Elsevier Ltd. All rights reserved.
Luminescent carbon nanodots (CNDs) with the size in the range 1–10 nm stand for a new class of carbon-based nanomaterials and have attracted tremendous interest due to their unique properties [1]. CNDs with tunable band gap, stable photoluminescence (PL), easy functionality, excellent biocompatibility, and lower cytotoxicity offer excellent potential candidates for various applications [1,2]. Unfortunately, though extensive efforts have been devoted to the synthesis and optical property investigations of CNDs, the research of the nonlinear optical (NLO) response to ultra-fast laser pulses has nearly been
6 9 ( 2 0 1 4 ) 6 3 8 –6 4 0
Available at www.sciencedirect.com
ScienceDirect journal homepage: www.elsevier.com/locate/carbon
Letter to the Editor
Carbon nanodots with strong nonlinear optical response Dezhi Tan a, Yuya Yamada b, Shifeng Zhou c, Yasuhiko Shimotsuma b, Kiyotaka Miura b,
Jianrong Qiu a,c,* a State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou,
Zhejiang 310027, PR China b Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan c State Key Laboratory of Luminescence Materials and Devices and the Institute of Optical Communication Materials, South China University of Technology, Guangzhou, Guangdong 510640, PR China
A R T I C L E I N F O
A B S T R A C T
Article history:
The carbon nanodots (CNDs) were synthesized by a simple method of femtosecond laser
Received 14 November 2013
ablation of bagasse in ethanol. Strong optical limiting effects of as-prepared CNDs to
Accepted 19 December 2013
800 nm femtosecond laser pulses were observed with the threshold of 74 mJ/cm2. The
Available online 26 December 2013
strong two photon absorption of CNDs is responsible for the optical limiting response.
The nonlinear coefficient was determined by the open-aperture Z-scan technique.
Ó 2013 Elsevier Ltd. All rights reserved.
Luminescent carbon nanodots (CNDs) with the size in the range 1–10 nm stand for a new class of carbon-based nanomaterials and have attracted tremendous interest due to their unique properties [1]. CNDs with tunable band gap, stable photoluminescence (PL), easy functionality, excellent biocompatibility, and lower cytotoxicity offer excellent potential candidates for various applications [1,2]. Unfortunately, though extensive efforts have been devoted to the synthesis and optical property investigations of CNDs, the research of the nonlinear optical (NLO) response to ultra-fast laser pulses has nearly been