High-quality 2-μm Q-switched pulsed solid-state lasers using spin-coating-coreduction approach synthesized Bi2Te3 topological insulators

• DOI: 10.1364/prj.6.000314
• Publication Date: 2018-03-27T18:48:53Z
• Authors: Junpeng Qiao; Shengzhi Zhao; Kejian Yang; Wei-Heng Song; Wenchao Qiao; Chung-Lung Wu; Jia Zhao; Guiqiu Li; Dechun Li; Tao Li; Hong Liu; Chao-Kuei Lee
• Keywords: Pulse duration; Topological insulator; Exfoliation joint

In this paper, the fabrication process and characterization of Bi2Te3 topological insulators (TIs) synthesized by spin-coating-coreduction approach (SCCA) is reported. With approach, high-uniformity nano-crystalline TI saturable absorbers (TISAs) with large-area uniformity controllable thickness are prepared. By employing these prepared TIs different thicknesses as SAs in 2-μm solid-state Q-switched lasers, thickness-dependent output powers pulse durations laser pulses obtained, result also exhibits stability reliability. The shortest duration short 233 ns, corresponding clock amplitude jitter around 2.1%, which TISA-based lasers to best our knowledge. Moreover, comparison TISA ultrasound-assisted liquid phase exfoliation (UALPE) method, experimental results show that SCCA TISAs have higher powers, shorter durations, peak powers. Our work suggests could be used potential pulsed lasers.