Quantum Dot Structures for Multi-band Infrared and Terahertz Radiation Detection
作者： G. Ariyawansa , A.G.U. Perera
DOI: 10.1016/B978-0-08-046325-4.00022-0
关键词: Infrared 、 Dark current 、 Optoelectronics 、 Optics 、 Polarization (waves) 、 Responsivity 、 Terahertz radiation 、 Physics 、 Picosecond 、 Quantum well infrared photodetector 、 Quantum dot
摘要: Publisher Summary This chapter describes the multiband infrared (IR) and terahertz radiation detection. In field of IR detector technology, quantum dot photodetectors (QDIPs) have attracted attention researchers aiming to develop optoelectronic devices with improved performance. Compared well (QWIPs), QDIPs additional degrees confinement, leading three major advantages: are sensitive normal-incidence radiation, which is forbidden in n-type QWIPs due polarization selection rules, exhibit comparatively long effective carrier lifetimes, about hundreds picoseconds, confirmed by both theory experiment, low dark current. Ideally, should show performance characteristics such as high responsivity, detectivity, operating temperatures. The explains that multi-band detection has become an important tool technology a number applications. Detecting object's emission at multiple wavelengths can be used eliminate background effects reconstruct absolute temperature. also plays role differentiating object from its background.
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