Ta2NiSe5 nanosheets as a novel broadband saturable absorber for solid-state pulse laser generation

Abstract

Two-dimensional (2D) ternary chalcogenides have attracted great attentions because of their novel chemical and physical properties arising from the synergistic effect and stoichiometric variation with the additional third element compared with their binary counterparts. Here, high-quality 2D tantalum nickel selenide (Ta 2 NiSe 5 ) nanosheets are successfully fabricated by a liquid-phase exfoliation (LPE) method. The ultrafast excited carrier relaxation time and nonlinear optical absorption response are investigated and reveal that the prepared 2D Ta 2 NiSe 5 nanosheets have excellent broadband saturable absorption properties, which are further illustrated by three passively Q-switched (PQS) allsolid-state lasers operating at 1.0, 2.0 and 2.8 µm with the Ta 2 NiSe 5 nanosheet-based saturable absorber (SA). Furthermore, mode-locked laser operation with the pulse width as short as 356 fs is also realized at 1.0 µm. This work not only demonstrates the excellent nonlinear optical proprieties and optical modulation performance of Ta 2 NiSe 5 , but also paves the way for exploring the photonic and optoelectronic proprieties of ternary chalcogenide materials.

High-performance flexible broadband photodetectors enabled by 2D Ta2NiSe5 nanosheets

“…When the temperature exceeds 326 K, the monoclinic structure will become the orthogonal structure [29]. In addition, the direct narrow bandgap, wide IR absorption, unique in-plane anisotropy, highly efficient fluorescence quenching ability, and nonlinear optical properties make it has great application prospect in the fields of photodetectors [30][31][32][33][34][35], ultra-fast laser [36], and biomolecular nanosensor [37]. In this work, the monoclinic configuration of Ta 2 NiSe 5 crystal with semiconducting behavior is demonstrated.…”

Ternary Transition Metal Dichalcogenides for High Power Vector Dissipative Soliton Ultrafast Fiber Laser

“…Moreover, the 2D ternary TMDCs have demonstrated a wide variety of applications in optics, biosensors, electronics, and catalysis due to the plentiful structures and physical properties. [35,36] Until now, there have been a few reports of using 2D ternary TMDCs as SAs in fiber lasers for the generation of ultrashort pulses. [37,38] Yet, the study on the formation of dissipative solitons based on 2D ternary TMDCs is insufficient and no work has been reported on the vector features of dissipative solitons.…”

Passively Q-Switched Yb:CALGO Laser Based on Mo:BiVO4 Absorber

“…It has been well known that pulsed lasers have been applied in various areas, such as material processing, optical communication and medicine. The passively Q-switching technique via inserting saturable absorbers (SAs) in the resonators is a typical method to generate pulsed lasers [1][2][3][4][5]. Numerous studies on SAs have been done to investigate pulsed lasers.…”