Molecular spectrum of laterally coupled quantum rings under intense terahertz radiation

We study the influence of intense THz laser radiation and electric field on molecular states of laterally coupled quantum rings. Laser radiation shows the capability to dissociate quantum ring molecule and add 2-fold degeneracy to the molecular states at the fixed value of the overlapping size betwe...

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Bibliographic Details
Published in:Scientific reports Vol. 7; no. 1; p. 10485
Main Authors: Baghramyan, Henrikh M., Barseghyan, Manuk G., Laroze, David
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 05.09.2017
Nature Publishing Group
Subjects:
639/766/119/1000
639/925/357/995
Electric fields
Humanities and Social Sciences
Laser radiation
Lasers
multidisciplinary
Oscillations
Phase transitions
Science
Science (multidisciplinary)
ISSN:2045-2322, 2045-2322
Online Access:Get full text
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Summary:We study the influence of intense THz laser radiation and electric field on molecular states of laterally coupled quantum rings. Laser radiation shows the capability to dissociate quantum ring molecule and add 2-fold degeneracy to the molecular states at the fixed value of the overlapping size between rings. It is shown that coupled to decoupled molecular states phase transition points form almost a straight line with a slope equal to two. In addition, the electric field direction dependent energy spectrum shows unexpected oscillations, demonstrating strong coupling between molecular states. Besides, intraband absorption is considered, showing both blue and redshifts in its spectrum. The obtained results can be useful for the controlling of degeneracy of the discrete energy spectrum of nanoscale structures and in the tunneling effects therein.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-10877-y