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Ultrafast nonlinear absorption and nonlinear refraction in few-layer oxidized black phosphorus

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Abstract

We experimentally investigated the nonlinear optical response in few-layer oxidized black phosphorus (OBP) by the femtosecond Z-scan measurement technique, and found that OBP not only possesses strong ultrafast saturable absorption but also a nonlinear self-defocusing effect that is absent in black phosphorus (BP). The saturable absorption property originates mainly from the direct band structure, which is still maintained in OBP. The emergence of self-defocusing might originate from the combined consequences of the oxygen-induced defects in BP. Our experimental findings might constitute the first experimental evidence on how to dynamically tuneits nonlinear property, offering an inroad in tailoring its optical properties through chemical modification (oxidation, introducing defects, etc.). The versatile ultrafast nonlinear optical properties (saturable absorption and self-defocusing) imply a significant potential of the layered OBP in the development of unprecedentedoptoelectronic devices, such as mode lockers, optical switches, laser beam shapers, and wavelength converters.China Postdoctoral Science Foundation (2015M580731); Science and Technology Planning Project of Guangdong Province (2016B050501005).

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DOI:10.1364/prj.4.000286

基金项目:National Natural Science Foundation of China (NSFC) (61435010, 61505117); Science and Technology Innovation Commission of Shenzhen (KQTD2015032416270385);

收稿日期:2016-08-17

录用日期:2016-09-29

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Shunbin Lu:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Yanqi Ge:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Zhengbo Sun:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Zongyu Huang:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Rui Cao:Faculty of Information Technology, Macau University of Science and Technology, Macao
Chujun Zhao:Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China
Shuangchun Wen:Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, College of Physics and Microelectronic Science, Hunan University, Changsha 410082, China
Dianyuan Fan:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
Jianqing Li:Faculty of Information Technology, Macau University of Science and Technology, Macao
Han Zhang:SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

联系人作者:Han Zhang(hzhang@szu.edu.cn)

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引用该论文

Shunbin Lu, Yanqi Ge, Zhengbo Sun, Zongyu Huang, Rui Cao, Chujun Zhao, Shuangchun Wen, Dianyuan Fan, Jianqing Li, and Han Zhang, "Ultrafast nonlinear absorption and nonlinear refraction in few-layer oxidized black phosphorus," Photonics Research 4(6), 286-292 (2016)

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