Intersubband transitions in band gap engineered parabolic potential wells |
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| Affiliation: | 1. Department of Computer Science and Artificial Intelligence, College of Computer Science and Engineering, University of Jeddah, Jeddah 21589, Saudi Arabia;2. Department of Computer Science, Lahore Garrison University, DHA, Lahore, Pakistan;3. Department of Computer and Network Engineering, College of Computer Science and Engineering, University of Jeddah, Jeddah 21589, Saudi Arabia;1. Baku State University, 23 Z. Khalilov st., AZ1148, Baku, Azerbaijan;2. Azerbaijan University of Architecture and Construction, 5 A. Sultanova st., AZ1073, Baku, Azerbaijan;3. Institute of Physics, 131 H. Javid ave., AZ1143, Baku, Azerbaijan |
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| Abstract: | Intersubband transitions in spike-inserted wide parabolic quantum wells are investigated. A thin potential barrier within the pure parabola devides the electron system in two well separated but strongly coupled layers, which in turn drastically changes the collective excitations scheme. In contrast to a pure parabolic quantum well where according to the generalised Kohn's Theorem only one fixed resonance is observed, the collective intersubband transitions recover the complex coupling and splitting scheme of the single particle states of a strongly coupled system. We interpret our experimental findings in terms of resonant tunnel processes and discuss them using simple model calculations. |
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