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Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal

The spin-polarized second harmonic generation (SHG) of the recently synthesized CaCoSO single crystal is performed based on the calculated electronic band structure. The calculation reveals that the spin-up (↑) channel of CaCoSO possesses a direct energy gap (Γ(v)-Γ(c)) of about 2.187 eV, 1.187 eV (...

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Autor principal: Reshak, A. H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5390297/
https://www.ncbi.nlm.nih.gov/pubmed/28406164
http://dx.doi.org/10.1038/srep46415
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author Reshak, A. H.
author_facet Reshak, A. H.
author_sort Reshak, A. H.
collection PubMed
description The spin-polarized second harmonic generation (SHG) of the recently synthesized CaCoSO single crystal is performed based on the calculated electronic band structure. The calculation reveals that the spin-up (↑) channel of CaCoSO possesses a direct energy gap (Γ(v)-Γ(c)) of about 2.187 eV, 1.187 eV (K(v)-K(c)) for the spin-down (↓) channel and an indirect gap (Γ(v)-K(c)) of about 0.4 eV for the spin-polarized CaCoSO single crystal. The linear optical properties obtained reveal that the recently synthesized crystal exhibits considerable anisotropy with negative uniaxial anisotropy and birefringence favor to enhance the SHG. We have calculated the three non-zero tensor components of the SHG and found the [Image: see text] is the dominat component, one with a large SHG of about (d(33) = 6.936 pm/V at λ = 1064 nm), the half value of KTiOPO(4) (KTP). As the values of (↑)[Image: see text] < (↓)[Image: see text] < spin-polarized [Image: see text] are related to the values of the energy gap of (↑) 2.187 eV> (↓) 1.187 eV> spin-polarized gap 0.4 eV; therefore, a smaller energy gap gives better SHG performance. Furthermore, the microscopic first hyperpolarizability, β(ijk), is calculated.
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spelling pubmed-53902972017-04-14 Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal Reshak, A. H. Sci Rep Article The spin-polarized second harmonic generation (SHG) of the recently synthesized CaCoSO single crystal is performed based on the calculated electronic band structure. The calculation reveals that the spin-up (↑) channel of CaCoSO possesses a direct energy gap (Γ(v)-Γ(c)) of about 2.187 eV, 1.187 eV (K(v)-K(c)) for the spin-down (↓) channel and an indirect gap (Γ(v)-K(c)) of about 0.4 eV for the spin-polarized CaCoSO single crystal. The linear optical properties obtained reveal that the recently synthesized crystal exhibits considerable anisotropy with negative uniaxial anisotropy and birefringence favor to enhance the SHG. We have calculated the three non-zero tensor components of the SHG and found the [Image: see text] is the dominat component, one with a large SHG of about (d(33) = 6.936 pm/V at λ = 1064 nm), the half value of KTiOPO(4) (KTP). As the values of (↑)[Image: see text] < (↓)[Image: see text] < spin-polarized [Image: see text] are related to the values of the energy gap of (↑) 2.187 eV> (↓) 1.187 eV> spin-polarized gap 0.4 eV; therefore, a smaller energy gap gives better SHG performance. Furthermore, the microscopic first hyperpolarizability, β(ijk), is calculated. Nature Publishing Group 2017-04-13 /pmc/articles/PMC5390297/ /pubmed/28406164 http://dx.doi.org/10.1038/srep46415 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Reshak, A. H.
Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title_full Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title_fullStr Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title_full_unstemmed Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title_short Spin-polarized Second Harmonic Generation from the Antiferromagnetic CaCoSO Single Crystal
title_sort spin-polarized second harmonic generation from the antiferromagnetic cacoso single crystal
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5390297/
https://www.ncbi.nlm.nih.gov/pubmed/28406164
http://dx.doi.org/10.1038/srep46415
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