Boundary conditions of continuum states in characterizing photocurrent of GaAs/AlGaAs quantum well infrared photodetector |
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| Affiliation: | 1. Institute of Information and Communication, Chonbuk National University, 664-14 Deokjin-dong, Jeonju 561-756, Republic of Korea;2. School of Information Science and Technology, Donghua University, Shanghai, PR China;1. Laboratoire de Génie Physique, Université Ibn Khaldoun, Tiaret 14000, Algeria;2. Laboratoire de Microscope Electronique et Sciences des Matériaux, Université des Sciences et de la Technologie Mohamed Boudiaf, département de génie physique, BP1505 El m’naouar, Oran, Algeria;3. Laboratoire des Matériaux Magnétiques, Université Djillali Liabés, Sidi Bel-Abbes 22000, Algeria;4. Département des Sciences et de la Technologie, Faculté des Sciences Appliquées, Université Ibn Khaldoun, Tiaret 14000, Algeria;1. Department of Electrical and Electronic Engineering, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan;2. Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;1. Department of Nuclear Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand;2. Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand;3. National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Ministry of Science and Technology, Pathumthani, Thailand;4. National Electronic and Computer Technology Center (NECTEC), National Science and Technology Development Agency, Ministry of Science and Technology, Pathumthani, Thailand;5. Department of Physics, Faculty of Science, Kasetsart University, Bangkok, Thailand;1. Department of Electrical and Electronic Engineering, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan;2. Department of Materials Science and Engineering, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan |
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| Abstract: | We study the optical transition between bound-to-continuum states in a GaAs/AlGaAs multiple quantum well infrared photodetector (QWIP) by analyzing three possible boundary conditions for the continuum states. Comparing with experimental results, it has been suggested that the Bloch-state boundary conditions are proper for continuum states in the QWIPs consisting of multiple quantum wells and the fine structures in the responsivity spectrum result from the energy dispersion relationship of the multiple quantum wells. |
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