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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects of crossed electric and magnetic fields on the interband optical absorption spectra of variably spaced semiconductor superlattices

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Zuleta, J. N. [1] ; Reyes-Gomez, E. [1]
Total Authors: 2
[1] Univ Antioquia UdeA, Inst Fis, Calle 70 52-21, Medellin - Colombia
Total Affiliations: 1
Document type: Journal article
Source: PHYSICA B-CONDENSED MATTER; v. 488, p. 72-82, MAY 1 2016.
Web of Science Citations: 2

The interband optical absorption spectra of a GaAs-Ga1-xAlxAs variably spaced semiconductor super lattice under crossed in-plane magnetic and growth-direction applied electric fields are theoretically investigated. The electronic structure, transition strengths and interband absorption coefficients are analyzed within the weak and strong magnetic-field regimes. A dramatic quenching of the absorption coefficient is observed, in the weak magnetic-field regime, as the applied electric field is increased, in good agreement with previous experimental measurements performed in a similar system under growth-direction applied electric fields. A decrease of the resonant tunneling in the superlattice is also theoretically obtained in the strong magnetic-field regime. Moreover, in this case, we found an interband absorption coefficient weakly dependent on the applied electric field. Present theoretical results suggest that an in-plane magnetic field may be used to tune the optical properties of variably spaced semiconductor superlattices, with possible future applications in solar cells and magneto-optical devices. (C) 2016 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/21320-3 - The physics of novel materials: photonics, photonic band structure, control of photonic band gap in photonic structures, plasmon polaritons, and gap solitons
Grantee:Luiz Eduardo Moreira Carvalho de Oliveira
Support type: Research Grants - Visiting Researcher Grant - International