Geometry-Tuned Optical Absorption Spectra of the Coupled Quantum Dot-Double Quantum Ring Structure.
Nanomaterials (Basel)
; 14(16)2024 Aug 11.
Article
em En
| MEDLINE
| ID: mdl-39195375
ABSTRACT
We investigate the energy spectra and optical absorption of a 3D quantum dot-double quantum ring structure of GaAs/Al0.3Ga0.7As with adjustable geometrical parameters. In the effective mass approximation, we perform 3D numerical computations using as height profile a superposition of three Gaussian functions. Independent variations of height and width of the dot and of the rings and also of the dot-rings distance determine particular responses, useful in practical applications. We consider that a suitable manipulation of the geometrical parameters of this type of quantum coupling offer a variety of responses and, more important, the possibility of a fine adjusting in energy spectra and in the opportunity of choosing definite absorption domains, properties required for the improvement of the performances of optoelectronic devices.
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MEDLINE
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Ano de publicação:
2024
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Article