Broadly Tunable Plasmons in Doped Oxide Nanoparticles for Ultrafast and Broadband Mid-Infrared All-Optical Switching

Qiangbing Guo; Zhipeng Qin; Zhuan Wang; Yu-Xiang Weng; Xiaofeng Liu; Guoqiang Xie; Jianrong Qiu

doi:10.1021/acsnano.8b07866

journal article·2018-12-26

Broadly Tunable Plasmons in Doped Oxide Nanoparticles for Ultrafast and Broadband Mid-Infrared All-Optical Switching

Qiangbing Guo, Zhipeng Qin, Zhuan Wang, Yu-Xiang Weng, Xiaofeng Liu, Guoqiang Xie, Jianrong Qiu

ACS Nano· Volume 12· Issue 12

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Source abstract

Abstract

Plasmons in conducting nanostructures offer the means to efficiently manipulate light at the nanoscale with subpicosecond speed in an all-optical operation fashion, thus allowing for construction of high performance all-optical signal-processing devices. Here, by exploiting the ultrafast nonlinear optical properties of broadly tunable mid-infrared (MIR) plasmons in solution-processed, degenerately doped oxide nanoparticles, we demonstrate ultrafast all-optical switching in the MIR region, which features subpicosecond response speed (with recovery time constant of <400 fs) as well as an ultrabroadband response spectral range (covering 3.0-5.0 μm). Furthermore, with the degenerately doped nanoparticles as Q-switch, pulsed fiber lasers covering 2.0-3.5 μm were constructed, of which a watt-level fiber laser at 3.0 μm band shows superior overall performance among previously reported passively Q-switched fiber lasers at the same band. Notably, the degenerately doped nanoparticles show great potential to work in the spectral range over 3.0 μm, which is beyond the accessibility of commercially available but expensive semiconducting saturable absorber mirror (SESAM). Our work demonstrates a versatile while cost-effective material solution to ultrafast photonics in the technologically important MIR region.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Advanced Fiber Laser Technologies · Optical Network Technologies · Plasmonic and Surface Plasmon Research

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

Affiliations

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China

Key Laboratory for Laser Plasmas (Ministry of Education), Collaborative Innovation Center of IFSA (CICIFSA), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

Beijing National Laboratory for Condensed Matter Physics, CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · Ministry of Human Resources and Social Security · National Natural Science Foundation of China · State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics · State Key Laboratory of Precision Spectroscopy, East China Normal University

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