journal article·2019-10-30

Heavily Doped Semiconductor Colloidal Nanocrystals as Ultra-Broadband Switches for Near-Infrared and Mid-Infrared Pulse Lasers

Rongfei Wei, Xiangling Tian, Hongyu Luo, Meng Liu, Zhaoliang Yang, Zhichao Luo, Haiming Zhu, Hai Guo, Jianfeng Li, Jianrong Qiu

ACS Applied Materials & Interfaces· Volume 11· Issue 43
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Abstract

Heavily self-doped semiconductors can be designed to be used in advanced photonics due to both fabrication and functional advantages. Ultrafast response, strong optical nonlinearity, broadband wavelength range, and accessibility of integration are major challenges for ultrafast all-optical photonics to operate in the infrared wavelength range. Here, solution-processed Cu1.8Se semiconductor nanocrystals (NCs) demonstrate an ultrafast response (about 360–520 fs), strong optical nonlinearity (as large as −1.4 × 103 cm GW–1), and broadband (from 800 to 3000 nm) nonlinear optical absorption in the near-infrared and mid-infrared wavelength ranges. The ultrafast response and larger optical nonlinearity may be triggered by the plasma ground-state bleaching in the strong surface electromagnetic filed. Stable Q-switched lasers in Er-doped fiber laser, Tm-doped fiber laser, and Ho/Pr-codoped ZBLAN fiber laser are operated, respectively. These findings indicate that Cu1.8Se NCs are prospective nonlinear materials for ultrafast response and broadband pulse laser.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Fiber Laser Technologies · Nonlinear Optical Materials Studies · Photonic Crystal and Fiber Optics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Zhejiang Normal University, Jinhua 321004, Zhejiang, P. R. China

State Key Laboratory of Luminescent Materials and Devices and School of Materials Science and Engineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, P. R. China

Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore

School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, P. R. China

School of Information and Optoelectronic Science and Engineering, South China Normal University, No. 378, West Waihuan Road, Guangzhou 510006, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · State Key Laboratory of High Field Laser Physics · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · State Key Laboratory of Luminescent Materials and Devices, South China University of Technology · State Key Laboratory of Precision Spectroscopy, School of Physics and Materials Science, East China Normal University

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