论文标题
在室温下能够在局部光谱的深伏范德华的高性能中IR
High-Performance Mid-IR to Deep-UV van der Waals Photodetectors Capable of Local Spectroscopy at Room Temperature
论文作者
论文摘要
对于广泛的关键应用，使用亚分式限制分辨率进行宽带光谱的能力是高度追求的。但是，目前需要复杂的提示技术来实现这一目标。我们通过证明了基于二维（2D）范德华异质结构的极端宽带光电探测器来绕过这一挑战，该异质结构在室温下从中红外（miR）到深粉料（DUV）的十年来对光线敏感。这些设备具有高探测率（> 10^9 cm Hz^1/2 W^-1）以及高带宽（2.1 MHz）。可以将活性区域进一步小型化至亚微米尺寸，远低于最长可检测的波长4.1 UM的衍射极限，从而使这种设备能够轻松测量原子层厚度样品的局部光学特性。这项工作可以导致在纳米级高光谱成像的低成本和高通量光发音器的发展。
The ability to perform broadband optical spectroscopy with sub-diffraction-limit resolution is highly sought-after for a wide range of critical applications. However, sophisticated tip-enhanced techniques are currently required to achieve this goal. We bypass this challenge by demonstrating an extremely broadband photodetector based on a two-dimensional (2D) van der Waals heterostructure that is sensitive to light across over a decade in energy from the mid-infrared (MIR) to deep-ultraviolet (DUV) at room temperature. The devices feature high detectivity (> 10^9 cm Hz^1/2 W^-1) together with high bandwidth (2.1 MHz). The active area can be further miniaturized to submicron dimensions, far below the diffraction limit for the longest detectable wavelength of 4.1 um, enabling such devices for facile measurements of local optical properties on atomic-layer-thickness samples placed in close proximity. This work can lead to the development of low-cost and high-throughput photosensors for hyperspectral imaging at the nanoscale.
