Broadband 1T-titanium selenide-based saturable absorbers for solid-state bulk lasers

Nanoscale
Bingzheng YanJingliang He

Abstract

1T-titanium selenide (1T-TiSe2), a representative of 1T phase transition metal dichalcogenides (TMDs), exhibits semimetallic behaviour with a nearly zero bandgap structure, which makes it a promising photoelectric material. A high-quality multilayer 1T-TiSe2 saturable absorber (SA) is successfully fabricated by a combination of liquid phase exfoliation and the spin coating method. The broadband nonlinear saturable absorption properties of the prepared 1T-TiSe2 SA are investigated by using the open aperture (OA) Z-scan method. Passively Q-switched (PQS) all-solid-state lasers with different bulk crystals at the wavelengths of 1.0, 1.3, 2.0 and 2.8 μm are realised based on the 1T-TiSe2 SA. To the best of our knowledge, this is the first presentation of the application of a 1T-TiSe2 material to all-solid-state bulk lasers. The results indicate that 1T-TiSe2 could be an alternative broadband SA for solid-state pulsed lasers and exhibits promising potential applications in mode-locked ultrafast lasers.

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Citations

Mar 20, 2019·Nanotechnology·Mengxia WangChenlin Du
Dec 10, 2020·Nanomaterials·Ping Kwong ChengYuen Hong Tsang
Feb 27, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Ashish KumarO P Sinha
Jul 29, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Veronika BruneSanjay Mathur

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Methods Mentioned

BETA
X-ray
scanning
transmission electron microscopy
transmission
electron diffraction
atomic force microscopy
AFM

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