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

9313749 Tsui发现由量子阱结构制成的电子能量过滤器在降低量子阱红外光电探测器的暗电流方面非常有用，从而提高了探测器的工作温度。 然而，与这种能量过滤过程相关的噪声特性尚未被详细研究。 我们提出了一个为期2年的研究计划，进行深入的调查与不同的频带结构的电子能量过滤器的噪声特性。 这一结果对设计低噪声、高灵敏度的量子阱探测器具有一定的参考价值。 该计划将分三个阶段进行：在第一阶段，我们将专注于设计和制造不同的能量滤波器结构，并建立适合目前设备的噪声表征设备。 第二阶段将集中于噪声测量和对结果的物理理解，基于这些结果，我们将在第三阶段设计和演示具有最低检测器噪声和最高灵敏度的量子阱检测器。

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.***