Layered iron pyrite for ultrafast photonics application

AbstractTwo-dimensional (2D) transition metal dichalcogenide materials have attracted much attention in recent years due to their excellent electro-optical properties. FeS2, the ideal composition of iron pyrite, is a 2D transition metal dichalcogenide which has been potentially used in the electronic, optical, and chemical fields. On the other hand, the narrow band gap of FeS2 (≈0.96 eV) makes it very suitable and promising for the ultrafast application in near-infrared regimes. However, the potential application of FeS2 in laser technology has not been explored till now. Ultrashort pulse lasers have great applications in industry and science because of its stability, ease of operation, and portability. Passively mode-locked fiber lasers using 2D materials (such as MoS2, CuS2, and WS2) as saturable absorber are intensively investigated. Here, layered FeS2 has been characterized systematically. It is successfully applied in ultrafast photonics and plays a key component in the passively mode-locked laser for the first time. The single pulse can be obtained with 1.7-ps pulse duration, 1.89-nm spectral width, and fundamental repetition of 6.4 MHz at 1563 nm central wavelength. Through controlling the pump power, the evolution of the pulse train can be observed, which can be transformed from single pulse to bound states. Also, the harmonic mode-locked fiber laser is observed with the pump power high enough.

Download Full-text

Ultrafast Yb-Doped Fiber Laser Using Few Layers of PdS2 Saturable Absorber

Nanomaterials ◽

10.3390/nano10122441 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2441

Author(s):

Ping Kwong Cheng ◽

Shunxiang Liu ◽

Safayet Ahmed ◽

Junle Qu ◽

Junpeng Qiao ◽

...

Keyword(s):

Pump Power ◽

Laser Pulse ◽

Saturable Absorber ◽

Nonlinear Optical ◽

Near Infrared ◽

Single Pulse ◽

Research Field ◽

Transition Metal Dichalcogenide ◽

Stable Mode ◽

Mode Locked Laser

Two-dimensional (2D) transition metal dichalcogenide (TMD) materials have exceptional optoelectronic and structural properties, which allow them to be utilized in several significant applications in energy, catalyst, and high-performance optoelectronic devices. Among other properties, the nonlinear optical properties are gaining much attention in the research field. In this work, a unique pentagonal TMD material, palladium disulfide (PdS2), is employed as a saturable absorber (SA) in an ytterbium-doped fiber (YDF) laser cavity and mode-locked laser pulse is generated. At first, liquid phase exfoliation is performed to prepare PdS2 nanoflakes. Afterward, the PdS2-nanoflakes solution was incorporated in the side-polished fiber (SPF) to form SPF-based PdS2-SA. By utilizing this SA, a highly stable mode-locked laser pulse is realized at pump power of 160 mW, which has a center wavelength of 1033 nm and a 3-dB spectral bandwidth of 3.7 nm. Moreover, the pulse duration, maximum power output and corresponding single-pulse energy were determined as 375 ps, 15.7 mW and 0.64 nJ, respectively. During the experiment, the mode-locked pulse remained stable till the pump power reached a value of 400 mW and, for the regulation of power, the slope efficiency is calculated at about 4.99%. These results indicate that PdS2 material is a promising nonlinear optical material for ultrafast optical applications in the near-infrared (NIR) region.

Download Full-text

Large enhancement of second harmonic generation from transition-metal dichalcogenide monolayer on grating near bound states in the continuum

Optics Express ◽

10.1364/oe.26.000322 ◽

2018 ◽

Vol 26 (1) ◽

pp. 322 ◽

Cited By ~ 6

Author(s):

Tiecheng Wang ◽

Shihao Zhang

Keyword(s):

Transition Metal ◽

Second Harmonic Generation ◽

Harmonic Generation ◽

Bound States ◽

Second Harmonic ◽

Transition Metal Dichalcogenide ◽

Large Enhancement ◽

The Continuum

Download Full-text

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

Nanomaterials ◽

10.3390/nano11092364 ◽

2021 ◽

Vol 11 (9) ◽

pp. 2364

Author(s):

Lina Zhao ◽

Ye Yuan ◽

Luyang Tong ◽

Wenyu Zhang ◽

Zhongshuai Zhang ◽

...

Keyword(s):

Repetition Rate ◽

Peak Power ◽

Near Infrared ◽

Maximum Output Power ◽

Single Pulse ◽

Infrared Region ◽

Maximum Output ◽

Linear Absorption ◽

Central Wavelength ◽

Transmission Electron

A stable, passively Q-switched Yb:CaGdAlO4 laser based on Mo:BiVO4 saturable absorber was demonstrated. Close observations of the structure and morphology of the nanoparticles by using transmission electron microscope, Raman spectrum and linear absorption were measured. The nonlinear transmission of Mo:BiVO4 was characterized by a 30 ps laser with a central wavelength of 1064 nm and a repetition rate of 10 Hz. The experimental maximum output power of the pulsed laser was 510 mW with a repetition rate of 87 kHz and pulse width of 3.18 μs, corresponding to a peak power of 1.84 W and a single pulse energy of 5.8 μJ. The experimental results indicate that Mo:BiVO4-SA is a great candidate for passively Q-switched lasers in the near infrared region.

Download Full-text

Strain-induced bound states in transition-metal dichalcogenide bubbles

2D Materials ◽

10.1088/2053-1583/ab0113 ◽

2019 ◽

Vol 6 (2) ◽

pp. 025010 ◽

Cited By ~ 7

Author(s):

L Chirolli ◽

E Prada ◽

F Guinea ◽

R Roldán ◽

P San-Jose

Keyword(s):

Transition Metal ◽

Bound States ◽

Transition Metal Dichalcogenide

Download Full-text

A Transition Metal Dichalcogenide Tunnel FET-Based Waveguide-Integrated Photodetector Using Ge for Near-Infrared Detection

IEEE Sensors Journal ◽

10.1109/jsen.2019.2922250 ◽

2019 ◽

Vol 19 (20) ◽

pp. 9187-9193 ◽

Cited By ~ 2

Author(s):

Swati Joshi ◽

Prabhat Kumar Dubey ◽

Brajesh Kumar Kaushik

Keyword(s):

Transition Metal ◽

Near Infrared ◽

Infrared Detection ◽

Transition Metal Dichalcogenide ◽

Tunnel Fet

Download Full-text

Transition Metal Dichalcogenide Nanoantennas Lattice

MRS Advances ◽

10.1557/adv.2019.357 ◽

2019 ◽

Vol 4 (41-42) ◽

pp. 2283-2288 ◽

Cited By ~ 1

Author(s):

Viktoriia E. Babicheva

Keyword(s):

Refractive Index ◽

Transition Metal ◽

Near Infrared ◽

Building Blocks ◽

High Refractive Index ◽

Photonic Devices ◽

Transition Metal Dichalcogenide ◽

Optical Resonances ◽

Infrared Spectral ◽

Spectral Ranges

ABSTRACTHigh-index materials such as silicon and III-V compounds have recently gained a lot of interest as a promising material platform for efficient photonic nanostructures. Because of the high refractive index, nanoparticles of such materials support Mie resonances and enable efficient light control and its confinement at the nanoscale. Here we propose a design of nanostructure with multipole resonances where optical nanoantennas are made out of transition metal dichalcogenide, in particular, tungsten disulfide WS2. Transition metal dichalcogenide (TMDCs) possess a high refractive index and strong optical anisotropy because of their layered structure and are promising building blocks for next-generation photonic devices. Strong anisotropic response results in different components of TMDC permittivity and the possibility of tailoring nanostructure optical properties by choosing different axes and adjusting dimensions in design. The proposed periodic array of TMDC nanoantennas can be used for controlling optical resonances in the visible and near-infrared spectral ranges and engineering efficient ultra-thin optical components with nanoscale light confinement.

Download Full-text

Niobium diselenide nanosheets for a vector soliton fiber laser

Journal of Materials Chemistry C ◽

10.1039/d0tc03733h ◽

2020 ◽

Vol 8 (42) ◽

pp. 14954-14958

Author(s):

Huiran Yang

Keyword(s):

Transition Metal ◽

Fiber Laser ◽

Materials Science ◽

Transition Metal Dichalcogenide ◽

Niobium Diselenide ◽

Vector Soliton ◽

Ultrafast Photonics

Niobium diselenide (NbSe2), an emerging group VB transition metal dichalcogenide, has been widely used in materials science, chemistry, and physics, while the applications of NbSe2 in ultrafast photonics are still rare.

Download Full-text