Department of Physics, University of Wisconsin, Madison, WI 53706, USA.
Chem Soc Rev. 2018 Aug 28;47(17):6824-6844. doi: 10.1039/c8cs00206a.
The isolation of thermodynamically stable, free standing materials with single to few atom thicknesses has brought about a revolution in materials science, condensed matter physics and device engineering for opto-electronic applications. These two dimensional (2D) materials cover a broad range of electronic properties ranging from zero-band gap, semi-metallic graphene to wide band gap semiconductors in sulfides and selenides of Mo and W to metallic behavior in Ti, Nb and Ta sulfides and selenides. This permits their potential application in opto-electronic devices from terahertz frequencies up to the ultraviolet portion of the spectrum. However, their atomically thin nature poses fundamental challenges in driving efficient light-matter interactions. A range of strategies have been explored from the area of photonics and resonant optics that enhance the coupling and interaction of light with atomically thin layers to overcome this challenge. By comparing and contrasting critical advantages of integrating nanophotonic elements with 2D materials, this review highlights the challenges and advantages of such opto-electronic devices.
具有单层到少数原子层厚度的热力学稳定、独立的材料的分离，给材料科学、凝聚态物理和光电子应用的器件工程带来了一场革命。这些二维（2D）材料涵盖了广泛的电子性质，从零带隙、半金属石墨烯到宽能隙半导体，如 Mo 和 W 的硫化物和硒化物，再到 Ti、Nb 和 Ta 的硫化物和硒化物的金属行为。这使得它们有可能在从太赫兹频率到光谱的紫外部分的光电子器件中得到应用。然而，它们的原子薄性质在驱动有效的光物质相互作用方面带来了根本性的挑战。已经探索了一系列从光子学和共振光学领域的策略，这些策略增强了光与原子薄层的耦合和相互作用，以克服这一挑战。通过比较和对比将纳米光子元件与 2D 材料集成的关键优势，本文综述强调了这种光电设备的挑战和优势。
