Issue 43, 2018

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

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.

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

Article information

Article type
Paper
Submitted
13 mai 2018
Accepted
24 ago 2018
First published
28 ago 2018

Nanoscale, 2018,10, 20171-20177

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

B. Yan, B. Zhang, H. Nie, G. Li, X. Sun, Y. Wang, J. Liu, B. Shi, S. Liu and J. He, Nanoscale, 2018, 10, 20171 DOI: 10.1039/C8NR03859G

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