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Journal of Materials Science

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03-01-2022 | Advanced Nanomaterials

Non-linear response under terahertz radiation of an asymmetric Ga_1−xAl_xAs/GaAs/Ga_1−yAl_yAs V-groove nanowire confining a singly-ionized double donor

Authors: Eugenio Giraldo-Tobón, J. L. Palacio, Guillermo L. Miranda, M. R. Fulla

Published in: Journal of Materials Science | Issue 18/2022

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Abstract

The non-linear optical rectification (NOR), the generation of the second (SHG) and third harmonic (THG) of a singly ionized double donor (SIDD) confined in an asymmetric \(\mathrm {Ga_{1-x}Al_xAs/GaAs/ Ga_{1-y}Al_yAs}\) V-groove nanowire are theoretically calculated. The calculated energy levels exhibit a molecular-like behavior with anticrossing points due to V-groove’s pinch-offs. The carefully selected morphological parameters values of the V-groove allowed tuning the optical coefficients within the THz band. The NOR, SHG, and THG were found to be strongly dependent on the donor–donor distance. Larger values of the NOR for the SIDD in comparison to the single electron system were obtained. In contrast, larger values of the SHG and THG coefficients for single electrons can be calculated compared to the SIDD at small donor–donor distances.

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Title: Non-linear response under terahertz radiation of an asymmetric Ga1−xAlxAs/GaAs/Ga1−yAlyAs V-groove nanowire confining a singly-ionized double donor
Authors: Eugenio Giraldo-Tobón
J. L. Palacio
Guillermo L. Miranda
M. R. Fulla
Publication date: 03-01-2022
Publisher: Springer US
Published in: Journal of Materials Science / Issue 18/2022
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-021-06738-9

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