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arXiv · 1603.04407

Optical properties of potential-inserted quantum wells in the near infrared and Terahertz ranges

F. Raouafi·R. Samti·R. Benchamekh·R. Heyd·S. Boyer-Richard·P. Voisin·J-M. Jancu
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Abstract

We propose an engineering of the optical properties of GaAs/AlGaAs quantum wells using AlAs and InAs monolayer insertions. A quantitative study of the effects of the monolayer position and the well thickness on the interband and intersubband transitions, based on the extended-basis sp3d5s* tight-binding model, is presented. The effect of insertion on the interband transitions is compared with existing experimental data. As for intersubband transitions, we show that in a GaAs/AlGaAs quantum well including two AlAs and one InAs insertions, a three level {e1 , e2 , e3 } system where the transition energy e3-e2 is lower and the transition energy e2-e1 larger than the longitudinal optical phonon energy (36 meV) can be engineered together with a e3-e2 transition energy widely tunable through the TeraHertz range.

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F. Raouafi, R. Samti, R. Benchamekh, R. Heyd, S. Boyer-Richard, P. Voisin, J-M. Jancu. 2016-03-14. Optical properties of potential-inserted quantum wells in the near infrared and Terahertz ranges. https://doi.org/10.1016/j.ssc.2016.03.007

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