2D tungsten nanosheets: ascendant nonlinear absorption properties in the ultraviolet band

Abstract

Tungsten has been continuously excavated and explored to further its applications in the field of industrial and military, as a group ⅥB transition metal with an atomic number of 74....

Deep ultraviolet optical limiting materials: 2D Ti3C2 and Ti3AlC2 nanosheets

“…In transition metal materials, 2D tungsten (W) nanosheets have just been shown to be a better material for UV-band OL than 2D chromium (Cr) nanosheets and 2D GDY nanosheets. 57 The σ TPA of 2D W nanosheets at 355 nm is around 4.29 ± 0.05 × 10 −45 , which is lower than that of 2D Ti 3 AlC 2 and Ti 3 C 2 nanosheets, implying that NLA is more superior in Ti 3 AlC 2 and Ti 3 C 2 nanosheets. Due to the influence of the higher populations of nanosheets acting with the excitation laser, the samples with higher concentration are more likely to exhibit a better OL effect under the same excitation conditions.…”

“…In transition metal materials, 2D tungsten (W) nanosheets have just been shown to be a better material for UV-band OL than 2D chromium (Cr) nanosheets and 2D GDY nanosheets. 57 The s TPA of 2D W nanosheets at 355 nm is Due to the influence of the higher populations of nanosheets acting with the excitation laser, the samples with higher concentration are more likely to exhibit a better OL effect under the same excitation conditions. 58 The sample concentration in our experiment is the same as the sample concentration of W nanosheets reported in the literature (both are 100 mg L À1 ), 57 so the influence of the sample concentration on the comparison results can be excluded.…”

“…57 The s TPA of 2D W nanosheets at 355 nm is Due to the influence of the higher populations of nanosheets acting with the excitation laser, the samples with higher concentration are more likely to exhibit a better OL effect under the same excitation conditions. 58 The sample concentration in our experiment is the same as the sample concentration of W nanosheets reported in the literature (both are 100 mg L À1 ), 57 so the influence of the sample concentration on the comparison results can be excluded. After the above comparison with 2D single-element materials, our study reveals the outstanding UV NLA performance of Ti 3 AlC 2 and Ti 3 C 2 nanosheets, which benefit their laser applications in the UV waveband.…”

Infrared Saturable Absorption Properties of Tungstenene Nanosheets for Passively Q-Switched 1.9 μm Solid-State Laser

“…In recent years, new metalloid monolithic 2D layered materials with excellent electrical and nonlinear optical properties have emerged, among which both silicene and antimonene have been employed in all-solid-state PQS lasers to achieve pulsed laser output at 0.9, 1.06, and 1.34 μm, respectively. , Tellurene nanosheets also achieved excellent modulation of passive Q-switched pulsed lasers in the near-infrared and visible wavelength bands. , Tungsten, a transition-metal element, belongs to the VIB group and is one of the 90 naturally occurring elements . It plays an important role in industrial and military fields. , Tungsten has a melting point of 3420 °C, second only to carbon (3550 °C), and is a heat and wear-resistant metal with low compressibility, extremely high density, low thermal expansion, and high thermal conductivity . Tungsten disulfide, a compound of tungsten, is a high-quality SA commonly used in all-solid-state and fiber PQS lasers and has been employed for PQS at several wavelengths to obtain stable pulsed laser output .…”

“…20 It plays an important role in industrial and military fields. 21,22 Tungsten has a melting point of 3420 °C, second only to carbon (3550 °C), and is a heat and wear-resistant metal with low compressibility, extremely high density, low thermal expansion, and high thermal conductivity. 20 Tungsten disulfide, a compound of tungsten, is a high-quality SA commonly used in all-solid-state and fiber PQS lasers and has been employed for PQS at several wavelengths to obtain stable pulsed laser output.…”