Invited Review: Superlattice and multiquantum well avalanche photodetectors: physics,concepts and performance |
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| Institution: | 1. School of Information Engineering, China University of Geosciences, Wuhan 430074, PR China;2. School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074, PR China;1. Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, United Kingdom;2. Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Interdisciplinary Innovation Institute of Medicine and Engineering, Beihang University, Beijing 100191, China;3. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;4. Optical Division, National Institute of Metrology, Beijing 100029, China |
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| Abstract: | In this paper we review the underlying physical principles behind the workings of superlattice/multiquantum well avalanche photodiodes (APDs), examine various device concepts that have been proposed and developed, and discuss their performance. The basic operation, noise and frequency performance of APDs is discussed both in general and as applied to superlattice/multiquantum well devices. The theory of the impact ionization enhancement across a potential step is reviewed. Both experimental and theoretical studies of the ionization enhancement in the simple and doped multiquantum well APDs are discussed, and the progress to date in their realization is reviewed. We conclude with a summary of the performance features of these devices, including a discussion of device reliability and edge breakdown avoidance. |
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