Quasi-1D NbTe<sub>4</sub> for Broadband Pulse Generation from 1.0 to 3.0 μm: Bridging the Near- and Mid-Infrared

Quasi-1D NbTe<sub>4</sub> for Broadband Pulse Generation from 1.0 to 3.0 μm: Bridging the Near- and Mid-Infrared

Quasi-one-dimensional (quasi-1D) transition metal chalcogenides (TMCs), a subclass of low-dimensional materials, have attracted significant attention due to their unique optical and electronic properties, making them promising candidates for nonlinear photonics. In this work, NbTe<sub>4</su...

Full description

Saved in:
Bibliographic Details
Main Authors: Zian Cai, Wenyao Zhang, Qi Kang, Hongfu Huang, Xin Xiang, Shunbin Lu, Qiao Wen
Format: Article
Language:English
Published: MDPI AG 2025-03-01
Series:Nanomaterials
Subjects:
NbTe<sub>4</sub> nanosheets
broadband saturable absorber
passively Q-switched
passively mode-locked
Online Access:https://www.mdpi.com/2079-4991/15/6/424
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Quasi-one-dimensional (quasi-1D) transition metal chalcogenides (TMCs), a subclass of low-dimensional materials, have attracted significant attention due to their unique optical and electronic properties, making them promising candidates for nonlinear photonics. In this work, NbTe<sub>4</sub>, a quasi-1D transition metal tetrachalcogenide, was synthesized and employed for the first time as a broadband saturable absorber (SA) for pulsed laser applications. The nonlinear optical (NLO) properties of NbTe<sub>4</sub> were systematically characterized at 1.0 μm, 2.0 μm, and 3.0 μm, revealing saturation intensities of 59.53 GW/cm<sup>2</sup>, 14 GW/cm<sup>2</sup>, and 6.8 MW/cm<sup>2</sup>, with corresponding modulation depths of 17.4%, 5.3%, and 21.5%. Utilizing NbTe<sub>4</sub>-SA, passively Q-switched (PQS) pulses were successfully generated in the 1.0 μm and 2.0 μm bands, achieving pulse durations of 86 ns and 2 μs, respectively. Furthermore, stable mode-locked operation was demonstrated in an Er-doped fluoride fiber laser at 3.0 μm, yielding a pulse duration of 19 ps. These results establish NbTe<sub>4</sub> as a highly promising broadband SA material for next-generation ultrafast photonic devices and pave the way for the development of other quasi-1D materials in nonlinear optics.
ISSN:2079-4991

Similar Items