Copper Functionalized SnSe Nanoflakes Enabling Nonlinear Optical Features for Ultrafast Photonics

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: July 24, 2024

This study enhances the ultrafast photonics application of tin selenide (SnSe) nanoflakes via copper (Cu) functionalization to overcome challenges such as low conductivity and weak near-infrared (NIR) absorption. Cu concentration, induces strain, reduces bandgap through Sn substitution vacancy filling with ions. Demonstrated by density functional theory calculations experimental analyses, Cu-functionalized SnSe exhibits improved NIR optical absorption superior third-order nonlinear properties. Z-scan measurements femtosecond transient spectroscopy reveal better performance in terms properties shorter carrier relaxation times compared pristine SnSe. Furthermore, saturable absorbers based on both types, when integrated into an erbium-doped fiber laser, show that leads a decrease pulse duration 798 fs increase 3 dB spectral bandwidth 3.44 nm. Additionally, it enables stable harmonic mode-locking bound-state solitons. work suggests new direction for improving wide 2D materials highlighting enhanced potential photonics.

Language: Английский

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Sacrificial Layer for Sintering Enhancements of Ceramic, Semiconductor, and Metal Films: A Universal Strategy

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

Abstract The manufacturing of thin films through selective laser sintering micro/nanoparticles is an emerging technology that has been developing rapidly over the last two decades owing to its digitization, efficiency, and good adaptability various materials. However, high‐quality different materials remains a challenge: ceramic particles are difficult be sintered due low absorbance; metallic prone oxidation; semiconductor process for performance enhancement high stress. In this work, new approach proposed employs additional Indium Tin Oxide (ITO) sacrificial layer assist functional materials, which detaches after without contaminating target material. As absorber, ITO can raise temperature up 2950 K, resulting in well coarsening grains. oxygen barrier, maintains oxidation level metal die below 25%. homogenizer, delays cracking improves material, turn increases Seebeck factor 1.4‐fold. Therefore, material‐friendly, purity‐neutral strategy, supports multi‐materials high‐performance thin‐film devices.

Language: Английский

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Interfacial π‐Electron Cloud Extension and Charge Transfer Between Preferable Single‐Crystalline Conjugated MOFs and Graphene for Ultrafast Pulse Generation

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Abstract 2D conjugated metal‐organic frameworks (MOFs) have attracted significant attention in various fields due to their outstanding characteristics. However, the strong interlayer π–π stacking interactions, preparation of high‐quality and atomic‐scale single‐crystalline MOF structures continues pose a challenge. The investigation its nonlinear optical (NLO) property application for ultrafast photonics is still rare. Herein, ultrathin Cu 3 (HHTP) 2 Ni (HHTP = 2,3,6,7,10,11‐hexahydroxytriphenylene) nanosheets (CuHHTPNs NiHHTPNs) with characteristic are prepared by surfactant‐assisted solution synthesis strategy. Moreover, stacked CuHHTPNs(NiHHTPNs)/graphene van der Waals heterostructures (CuNsG‐VHS NiNsG‐VHS) achieved ultrasound‐assisted method. According characterization analyses theoretical simulations, this preferable exhibits superior π‐conjugated electron cloud extension, charge transfer, NLO properties. Noticeably, third‐order polarizability CuNsG‐VHS keeps relatively high level compared reported saturable absorber materials near‐infrared wavelength range. Based on these properties, can serve as an excellent achieve fundamental mode‐locking femtosecond pulse duration, high‐order harmonic GHz repetition frequency. These demonstrations provide valuable strategy development promising MOFs advanced optoelectronic devices.

Language: Английский

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Two-Dimensional Nano-PtTe₂ for Higher-Order Harmonic Mode-Locking Polarization-Locking Vector Soliton Ultrafast Fiber Laser

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

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Nonlinear properties investigation of 2D CrTe2 material and its application as a saturable absorber in a Yb-doped mode-locking fiber laser

Optical Materials, Journal Year: 2024, Volume and Issue: unknown, P. 116628 - 116628

Published: Dec. 1, 2024

Language: Английский

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Ag Doping Modified SnSe-Based Flexible Memristors for Artificial Optoelectronic Synapses

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 28, 2024

Language: Английский

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