High-Performance Mid-IR to Deep-UV van der Waals Photodetectors Capable of Local Spectroscopy at Room Temperature.
High-Performance Mid-IR to Deep-UV van der Waals Photodetectors Capable of Local Spectroscopy at Room Temperature.
复制标题
DOI：
10.1021/acs.nanolett.2c00741
复制
发表时间：
2022-01
期刊：
影响因子：
10.8
通讯作者：
Daozhi Shen;HeeBong Yang;C. Spudat;T. Patel;Shazhou Zhong;Fangchu Chen;Jian Yan;Xuan Luo;Meixin Cheng;G. Sciaini;Yuping Sun;D. Rhodes;T. Timusk;Y. Zhou;Na Young Kim;A. W. Tsen
中科院分区：
文献类型：
--
作者：
Daozhi Shen;HeeBong Yang;C. Spudat;T. Patel;Shazhou Zhong;Fangchu Chen;Jian Yan;Xuan Luo;Meixin Cheng;G. Sciaini;Yuping Sun;D. Rhodes;T. Timusk;Y. Zhou;Na Young Kim;A. W. Tsen
在广泛的关键应用中，具有低于衍射极限分辨率的宽带光学光谱学的能力备受追捧。然而，目前需要复杂的近场技术来实现这一目标。我们绕过了这一挑战，展示了一种基于二维(2D)van der Waals异质结构的极宽带光电探测器，该探测器对从室温下的中红外(MIR)到深紫外线(DUV)的十多年的光敏感。该器件具有高探测率(>；109 cm Hz1/2W-1)和高带宽(2.1 MHz)。有源区可以进一步小型化到亚微米尺寸，远远低于4.1μm的最长可检测波长的衍射极限，从而使这种设备能够方便地测量放置在近距离的原子层厚度样品的局部光学性质。这项工作可以开发出用于纳米级高光谱成像的低成本和高通量的光传感器。
The ability to perform broadband optical spectroscopy with subdiffraction-limit resolution is highly sought-after for a wide range of critical applications. However, sophisticated near-field 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 (>109 cm Hz1/2 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 μm, 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.