论文标题
高速中波红外统一载体光电探测器
High Speed Mid-Wave Infrared Uni-traveling Carrier Photodetector
论文作者
论文摘要
预期中波红外（MWIR）频率梳将显着提高分子光谱法的精度和灵敏度。对于高分辨率应用，高速MWIR光电探测器是关键组件之一，但是，市售高速MWIR光电探测器目前仅具有亚GHz带宽。在本文中，我们首次在室温下基于INAS/GASB II超级晶格（T2SL）的高速中波红外（MWIR）Uni-travel载波光电探测器。该设备的截止波长为5.6μm，在300K处直径为20μm的设备的3DB带宽为6.58 GHz。这些有希望的结果表明，该设备有可能用于高速应用，例如频率梳光谱，自由空间通信等。还讨论了光电探测器高频性能的局限性。
Mid-wave infrared (MWIR) frequency comb is expected to dramatically improve the precision and sensitivity of molecular spectroscopy. For high resolution application, high speed MWIR photodetector is one of the key components, however, the commercially available high speed MWIR photodetector only has sub-GHz bandwidth currently. In this paper, we demonstrate, for the first time to our knowledge, a high speed mid-wave infrared (MWIR) uni-traveling carrier photodetector based on InAs/GaSb type-II superlattice (T2SL) at room temperature. The device exhibits a cutoff wavelength of 5.6μm, and 3dB bandwidth of 6.58 GHz for a 20μm diameter device at 300K. These promising results show the device has potential to be utilized in high speed applications such as frequency comb spectroscopy, free space communication and others. The limitations on the high frequency performance of the photodetectors are also discussed.
