Fort Monmouth: Noise Characteristics of Superlattice Electron Energy Filters in Infrared Hot-Electron Transistors

9313749徐由量子井结构制成的电子能量滤光器被发现对降低量子井红外探测器的暗电流，从而提高探测器的工作温度非常有用。然而，与这种能量过滤过程相关的噪声特性还没有得到详细的研究。我们提出了一个为期两年的研究计划，对不同能带结构的电子能量滤光片的噪声特性进行深入的研究。这一结果将有助于设计低噪声、高灵敏度的量子井探测器。该计划将分三个阶段进行：第一阶段，我们将重点设计和制造不同的能量过滤器结构，并建立适合现有器件的噪声表征设备。第二阶段将集中在噪声测量和对结果的物理理解上，基于这些结果，我们将在第三阶段设计和演示具有最低探测器噪声和最高灵敏度的量子井探测器。

9313749 Tsui An electron energy filter made of quantum well structures is found extremely useful in reducing the dark current of a quantum well infrared photodetector, and thus increasing the detector operating temperature. However, the noise characteristics associated with this energy filtering process have not been investigated in detail. We propose a 2-year research program to conduct an in-depth investigation of the noise properties of electron energy filters with different band sturctures. The result will be useful in designing a low noise, high sensitivity quantum well detector. The program will be carried out in three stages: In the first stage we will focus on designing and fabricating different energy filter structures and setting up noise characterization equipment apropriate for the present devices. The second will concentrate on the noise measurements and a physical understanding of the results, and based on these results,and based on these reults, we will in third stage be designing and demonstrating quantum well detectors with lowest detector noise and highest sensitivity.***