【摘要】 半导体基中远红外探测器在成像、传感、国家安全以及国防领域具有广泛的应用背景。目前,在这个领域最主流的技术之一是量子阱红外探测器(QWIPs)。传统的量子阱红外探测器往往存在较大的暗电流和较低的工作温度等限制。量子级联探测器(QCDs)是一种新型的光伏型量子阱红外探测器。其工作原理基于电子吸收光子后在量子阱的子带间跃迁并且激发态电子通过人工设计的势能阶梯形成无需外加偏置电压的定向输运。这种基于新原理的红外探测器一经出现便引起人们高度的关注并经历了快速的发展。文中介绍了中国科学院半导体所在量子级联探测器研究方面的最新成果。更多还原

【Abstract】 Semiconductor-based mid-and far-infrared detectors have wide prospects for applications in imaging,sensing,security and defense field.At present,the quantum well infrared photodetector(QWIP) is one of the main technology in this field.On the other hand,the performance of the conventional QWIPs is limited by the bigger dark current and the lower operation temperature.Quantum cascade detector(QCD) is a new type of photovoltaic QWIP.Its operation principle is based on intersubband transitions in quantum wells embedded in an asymmetric conduction band potential,which enables the excited electrons to transport in the direction of potential drop without bias voltage.Since the invention,this kind of device has attracted much attention and experienced a rapid development.The latest results of institute of semiconductors of CAS about the research on quantum cascade photovoltaic infrared detector in 3-5 μm and 8-12 μm range were presented systematically.更多还原