SGER: Mid-Infrared Interband Cascade Photodetectors

SGER：中红外带间级联光电探测器

• 批准号: 0838439
• 负责人: Rui Yang
• 金额: --
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2010-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838439&HistoricalAwards=false
• 关键词: SGER; Mid; Infrared; Interband; Cascade

Objective:The objective of this research is to explore a new class of mid-infrared (IR) photodetectors based on the interband cascade (IC) structures, which can cover a wide infrared spectral range from 3 to 12 microns by merely adjusting quantum well layer thickness. Our goal is to achieve high performance and low noise IC photodetectors (focus on 4-7 microns) at room temperature or thermoelectric (TE) cooler temperatures. Intellectual Merit:IC photodetectors are based on a new operation principle combining advantages of very fast intersubband relaxation and interband tunneling for carrier transport and relatively slow interband transitions. This research will advance the understanding of physical processes such as carrier transport and photon absorption in IC photodetectors. Unlike photodetectors based on intersubband transitions, IC photodetectors are sensitive to normal incidence radiation. Furthermore, carrier transport/collection in the IC photodetector is immune from background doping and material quality variations in contrast to conventional semiconductor and type-II superlattice detectors. Hence, this research will provide opportunity to investigate new phenomena associated with underlying physics in interband cascade structures and devices, and lead to high performance mid-IR photodetectors that can operate at or near room temperature. Broader Impacts: This research will generate new knowledge in the design and understanding of quantum semiconductor structures and devices. The realization of high-performance mid-IR photodetectors will have significant impacts on medical, industrial, defense and homeland security applications. This work will provide students unique opportunities to have education, training and research through the inherent multidisciplinary topics.

目的：探索一种基于带间级联（IC）结构的新型中红外（IR）光电探测器，通过调节量子阱层的厚度，该探测器可以覆盖3 ~ 12 μ m的宽红外光谱范围。 我们的目标是在室温或热电（TE）冷却器温度下实现高性能和低噪声IC光电探测器（专注于4-7微米）。 智能优点：IC光电探测器基于一种新的工作原理，结合了载流子传输的快速子带间弛豫和带间隧穿以及相对较慢的带间跃迁的优点。 这项研究将促进对IC光电探测器中载流子输运和光子吸收等物理过程的理解。 与基于子带间跃迁的光电探测器不同，IC光电探测器对正入射辐射敏感。 此外，IC光电探测器中的载流子传输/收集与常规半导体和II型超晶格探测器相比不受背景掺杂和材料质量变化的影响。 因此，这项研究将提供机会，以调查与带间级联结构和设备的基础物理相关的新现象，并导致高性能的中红外光电探测器，可以在室温或接近室温下工作。 更广泛的影响：这项研究将在量子半导体结构和器件的设计和理解方面产生新的知识。 高性能中红外光电探测器的实现将对医疗、工业、国防和国土安全应用产生重大影响。 这项工作将为学生提供独特的机会，通过固有的多学科主题进行教育，培训和研究。