Nonlinear optical responses in two-dimensional transition metal dichalcogenide multilayer: WS_2, WSe_2, MoS_2 and Mo_05W_05S_2: publisher’s note

Advanced Optical Materials

et al. 2019

2D van der Waals metal 3R phase niobium disulfide (3R‐NbS2) has fascinating anisotropic, magnetic, optical, and superconducting properties. Herein, few‐layered 2D 3R‐NbS2 nanosheets are fabricated by combining liquid phase exfoliation and spin‐coating methods. The first principles calculations are performed to explore their electronic band structures to reveal the metallic properties and enhanced optical absorption as thickness increased. The linear and nonlinear optical properties arising from the plasmonic effects and nonequilibrium electrons are studied through the violet–visible–near‐infrared absorption spectroscopy, polarization‐resolved optical microscopy, and open‐aperture Z‐scan methods. The nonlinear absorption coefficient and imaginary part of the third‐order susceptibility are determined to be −2.5 × 106 cm GW−1 and −2.4 × 10−6 esu at 1064 nm. Furthermore, 2D 3R‐NbS2 nanosheets based saturable absorbers are fabricated and applied in solid‐state pulsed lasers, in which a continuous‐wave mode‐locking laser operation at 1050.6 nm is demonstrated with a pulse duration of 302 fs. The results not only verify that 2D metallic materials, such as 3R‐NbS2, are excellent nonlinear optical modulators, but also will arouse a general interest in designing novel materials/structures with 2D metallic materials for electronic and photonic devices.

Section: Resultsmentioning

confidence: 98%

Optical Properties of 2D 3R Phase Niobium Disulfide and Its Applications as a Saturable Absorber

Sun

Shi

Advanced Optical Materials

et al. 2019

“…In addition, the two‐photon absorption response of WS 2 and WSe 2 films was also discovered, as shown in Figure d–f. Recently, more TMDCs including MS 2 , MSe 2 , MTe 2 , have been also deeply studied. These explorations lay a foundation for their applications in nonlinear photonics.…”

Section: Fundamental Of 2d Layered Materialsmentioning

confidence: 99%

2D Layered Materials: Synthesis, Nonlinear Optical Properties, and Device Applications

Guo

Xiao

Laser & Photonics Reviews

et al. 2019

388

197

In recent years, 2D layered materials, including graphene, topological insulators, transition metal dichalcogenides, black phosphorus, MXenes, graphitic carbon nitride, and metal‐organic frameworks, have attracted considerable interest due to their potential applications in the fields of physics, chemistry, biology, and energy. Their rise in the field of nonlinear photonics began around 2009 and has become an important research direction. Here, the synthesis techniques, nonlinear optical properties, integration strategies, and device applications of layered materials are reviewed. In terms of nonlinear optical properties, the focus is on saturable absorption and Kerr nonlinearity. On this basis, their applications in various pulsed lasers, including fiber lasers, solid‐state lasers, waveguide lasers, and related nonlinear optical phenomenon, are summarized. In addition, novel optical devices using layered materials, such as optical modulators, optical polarizers, optical switchers, and even all‐optical device, are also involved. It is believed that the development of 2D layered materials in the field of photonics will continue to deepen, thus laying a good foundation for its practical application.

“…[ 245 ] NLO properties for TMDCs have been measured with both closed aperture and with open aperture Z‐scan, where MoS 2 and WS 2 both have SA and WSe 2 and Mo (0.5) W (0.5) S 2 exhibit NL (2PA). [ 246 ] The NLO dispersions responses of MoSe 2 , MoS 2, and MoTe 2 have been investigated by using the Z‐scan technique for ps and fs in the range of visible to near‐infrared. All three MoX 2 have dispersions, which is solid proof of broadband SA response.…”

Section: Fundamental Concept About 2d Materials and Their Optical Propertiesmentioning

confidence: 99%

An Insightful Picture of Nonlinear Photonics in 2D Materials and their Applications: Recent Advances and Future Prospects

Ahmed

Advanced Optical Materials

Kalsoom

et al. 2021

The nonlinear optical (NLO) materials are playing a crucial role in almost all aspects of photonics including imaging frequency, manipulation, photon generation, transmission and detection. The nonlinear optics aims to investigate light response in NLO media, in which the NLO response is normally weak and low energy efficient. A comprehensive summary, discussion, and correlation of the light–matter interaction in the 2D nano‐platform, like graphene and TMDCs, would be inspirational and timely needed. In this contribution, a broad overview and discussion about recent experimental evolution regarding the NLO response and its corresponding applications in various 2D materials are presented. A wide material library including graphene, transition metal dichalcogenides, black phosphorus, MXenes, semimetals, polymer materials, and hybrid structures (0D, 1D, 3D) are discussed. In this review, the qualitative description of NLO is firstly illustrated, followed by various fundamental NLO processes being highlighted. Fundamental limits of nonlinear optics and some of NLO applications are prospected. It is hoped that this comprehensive review will shed a light on the development of nonlinear optics with 2D materials to be applied in the field of photonics and optoelectronics.