Nonlinear Optical Properties and Ultrafast Carrier Dynamics of 2D Indium Selenide Nanosheets
Source abstract
Abstract
Abstract This work reports the nonlinear optical properties and ultrafast carrier dynamics of indium selenide (InSe) nanosheets obtained via liquid‐phase exfoliation under pulsed excitation with different durations. InSe nanosheets exhibit a better saturable absorption response under 6 ns pulse excitation than that under 380 fs excitation. In addition, the scattering phenomena of InSe dispersions with different mechanisms under various pulse durations are discovered, which are caused by the thermal effect under ns pulse excitation and dynamic spatial self‐phase modulation affected by laser streaming under fs pulse excitation. The pump‐probe measurements reveal that the InSe dispersion has ultrafast saturable absorption and photoinduced absorption processes, which may be caused by free carrier absorption or bandgap renormalization.
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Research context
OpenAlex topics: Advanced Fiber Laser Technologies · Nonlinear Optical Materials Studies · Nonlinear Optical Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory of Micro‐Nano Optoelectronic Materials and Devices Key Laboratory of Materials for High‐Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China
CAS Center for Excellence in Ultra‐intense Laser Science (CEULS) Shanghai 201800 China
State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China
Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China
Institute of Physics Chinese Academy of Sciences Beijing 100190 China
Funding
National Natural Science Foundation of China · China Postdoctoral Science Foundation
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