2021年9月22日 · Here, we demonstrate the significant enhancement of SHG and THG in a transition-metal-dichalcogenide (TMDC) MoS 2 metasurface in the sub-diffractive, single-beam nonlinear emission in the...

2020年8月19日 · Here we report on the SHG from homo- and heterostructural TMD bilayers formed by artificial stacking with an arbitrary stacking angle. The SHG from the twisted bilayers is a coherent superposition of the SH fields from the individual layers, with a phase difference depending on the stacking angle.

In particular, we measured second harmonic generation (SHG) in MoS 2 and WS 2 on fluorine tin oxide (FTO), which presents an epsilon-near zero point near our 1550 nm pump wavelength. Polarized SHG measurements reveal an SHG intensity that is one order of magnitude higher on FTO than on a glass substrate.

二维过渡金属硫化物 (transition metal dichalcogenides, TMDCs)由于可实现从间接带隙到直接带隙半导体的转变, 能带宽度涵盖可见光到红外波段, 及二维限域所带来的优异光电特性, 在集成光子以及光电器件领域受到了广泛的关注. 最近随着二维材料基础非线性光学研究的深入, 二维TMDCs也展现出了在非线性光学器件应用上的巨大潜能. 本综述聚焦于二维层状TMDCs中关于二次谐波的研究工作. 首先简述一些基本的非线性光学定则, 然后讨论二维TMDCs中原子层数、偏振、激子 …

2024年2月29日 · In this work, we perform direct integration of TMDs onto a plasmonic nanocircuitry. By controlling the polarization angle of the input laser, we show selective routing of second-harmonic generation...

2018年7月4日 · Our results reveal that by alloying TMD and BN layers, the χ (2) response improves in particular ranges of energy which makes them attractive for robust nonlinear optical devices. In particular,...

2014年2月25日 · Optical second harmonic generation (SHG) is known as a sensitive probe to the crystalline symmetry of few-layer transition metal dichalcogenides (TMDs). Layer-number dependent and polarization resolved SHG have been observed for the special case of Bernal stacked few-layer TMDs, but it remains largely unexplored for structures deviated from ...

2016年8月11日 · Here, optical second-harmonic generation (SHG) in imaging mode is shown to be a versatile tool for systematic time-resolved investigations of TMDC monolayers and heterostructures in consideration of the material's structure. Large sample areas can be probed without the need of any mapping or scanning.

2021年11月1日 · Few layered transition metal dichalcogenides (TMD), with an absence of crystal inversion symmetry and outstanding optical characteristics, are frequently applied in studies of nonlinear optics (NLO) for harmonic generation. Related materials are regarded as potential candidates for many optoelectronics applications.

2018年1月4日 · Monolayer two-dimensional transition-metal dichalcogenides (2D TMDCs) exhibit promising characteristics in miniaturized nonlinear optical frequency converters, due to their inversion asymmetry and large second-order nonlinear susceptibility.