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SnSe2 Nanosheets for Subpicosecond Harmonic Mode-Locked Pulse Generation
Ji-Shu Liu1, Xiao-Hui Li1, Yi-Xuan Guo1
1School of Physics & Information Technology, Shaanxi Normal University, Xi'an, 710119, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 3, 2019
Summary
Tin diselenide (SnSe2) nanosheets demonstrate excellent nonlinear optical properties. These 2D materials function as effective saturable absorbers in fiber lasers, enabling ultrafast photonics applications.
Area of Science:
- Materials Science
- Optics and Photonics
- Nanotechnology
Background:
- Tin diselenide (SnSe2) is a novel 2D layered material with significant optical properties.
- Ultrafast photonics offers advantages like high peak power and narrow bandwidth, driving demand for advanced materials.
Purpose of the Study:
- To fabricate and characterize SnSe2 nanosheets.
- To investigate the potential of SnSe2 nanosheets as a fiber-based saturable absorber for ultrafast photonics.
Main Methods:
- Solvothermal treatment was used to synthesize SnSe2 nanosheets.
- The evanescent field effect was utilized to integrate SnSe2 nanosheets into a fiber-based saturable absorber.
- An Er-doped fiber laser was employed to test the saturable absorber's performance.
Main Results:
- SnSe2 nanosheets were successfully synthesized and characterized.
- The SnSe2-based saturable absorber supported high pump power.
- 31st-order subpicosecond harmonic mode locking was achieved, with a maximum repetition rate of 257.3 MHz and pulse duration of 887 fs.
Conclusions:
- SnSe2 nanosheets exhibit excellent nonlinear optical properties suitable for ultrafast photonics.
- SnSe2 is a promising material for developing advanced nonlinear photonic devices, including lasers and photodetectors.
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