Optical properties and applications of SnS₂ SAs with different thickness

Abstract

Q-switched lasers have occupied important roles in industrial applications such as laser marking, engraving, welding, and cutting due to their advantages in high pulse energy. Here, SnS 2 -based Q-switched lasers are implemented. Considering that SnS 2 inherits the thickness sensitive optical characteristics of TMD, three kinds of SnS 2 with different thickness are characterized in terms of nonlinearity and used to realize the Q-switched pulses under consistent implementation conditions for comparison tests. According to the results, the influence of thickness variation on the nonlinear performance of saturable absorber, such as modulation depth and absorption intensity, and the influence on the corresponding laser are analyzed. In addition, compared with other traditional saturable absorbers, the advantage of SnS 2 in realizing ultrashort pulses is also noticed. Our work explores the thickness-dependent nonlinear optical properties of SnS 2 , and the rules found is of great reference value for the establishment of target lasers.

Perovskite-transition metal dichalcogenides heterostructures: recent advances and future perspectives

“…The very best perovskite LEDs can electrically illuminate with an external quantum efficiency of more than 20% 306−309 . Light emission from TMD monolayers via p-n junctions 59,310,311 or Joule heat-ing 312 as well as lasing from both TMD monolayers and TMDs HSs have been demonstrated 62,63,65,66,127 . Large area materials growth or synthesis is critical for future device applications.…”

Q‐switched Nd:YVO4 laser with TiS2 saturable absorber

“…Recently, graphene‐like two‐dimensional (2D) materials attracted the attention of researchers 15–18 . According to previous works, many 2D materials were used as SAs in fiber and solid‐state lasers 19–30 . TiS 2 is a new 2D material with appropriate modulation depth, high damage threshold, and high stability, but there are few reports of TiS 2 SA in fiber and solid‐state lasers 31,32 …”

“…[15][16][17][18] According to previous works, many 2D materials were used as SAs in fiber and solid-state lasers. [19][20][21][22][23][24][25][26][27][28][29][30] TiS 2 is a new 2D material with appropriate modulation depth, high damage threshold, and high stability, but there are few reports of TiS 2 SA in fiber and solid-state lasers. 31,32 In this paper, the liquid-phase ultrasonic stripping preparation method was used to fabricate TiS 2 SA, and a Q-switched Nd:YVO 4 laser was demonstrated by using the TiS 2 SA.…”

Black phosphorus quantum dots: Nonlinear optical modulation material with ultraviolet saturable absorption

“…Diverse 2D materials show an expected saturable absorption response in broadband [26][27][28]. In recent years, semiconductor saturable absorber resonators based on graphene [29], transition metal dichalcogenides [30][31][32], BP [33,34], and other low-dimensional materials [35][36][37][38] have been reported in the near-infrared and mid-infrared regions. Due to the limitation to nonlinear saturable absorber materials, the wavelength of the ultrashort pulsed laser is mainly limited in the range of 0.8-2.0 μm.…”