Estudo das propriedades ópticas em pontos quânticos de CdTe carregados

Estudo das propriedades ópticas em pontos quânticos de CdTe carregados

Autores

DOI:

https://doi.org/10.5433/1679-0375.2020v41n2p205

Palavras-chave:

Pontos quânticos, Carga adicionada, Absorção óptica, Interação de Coulomb

Resumo

In this article we theoretically study how the presence of charge carriers added to the conduction and valence band of a spherical CdTe quantum dot affects the optical properties, especially the absorption coefficient. For this study, we simulated the interband optical absorption spectrum for incident light with circular polarizations on the left (ê-), on the right (ê+) and linear (êz). We also consider Coulomb's interaction between optically excited and added carriers.

Biografia do Autor

Silvio José Prado, Instituto de Ciências Exatas e Naturais do Pontal, Universidade Federal de Uberlândia

Doutor em Ciências pela  UFSCar. Professor do curso de licenciatura em Física do ICENP.

Referências

FRANCESCHETTI ,A.; ZUNGER, A.. Optical transitions in charged CdSe quantum dots, Physical Review B, v. 62, R16287, 2000.

HOLTKEMPER, M., REITER, D. E., KUHN, T.. Influence of the quantum dot geometry on p-shell transitions in differently charged quantum dots. Phys. Rev. B, v. 97, 075308, 2018.

KAIFENG, W.; YOUNG-SHIN, P.; JAEHOON, L.; KLIMOV, V.. Towards zero-threshold optical gain using charged semiconductor quantum dots. Nature Nanotechnology, v. 12, 2017.

JAEHOON, L.; KLIMOV, V.. Superposition Principle in Auger Recombination of Charged and Neutral Multicarrier States in Semiconductor Quantum Dots. ACS Nano, v. 11, p. 8437–8447, 2017.

KOZLOV, O. V.; YOUNG-SHIN, P.; JEONGKYUN, R.; FEDIN, I.; NAKOTTE, T.; KLIMOV, V. I.. Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity. Science, v. 365, p. 672-675, 2019.

LÓPEZ-RICHARD, V.; ALCALDE, A. M.; PRADO, S. J.; MARQUES, G. E.; TRALLERO-GINER C.. Intraband magnetoabsorpiton as a probing tool for the quantum dots charge. Applied Physics Letter, v. 87, p. 231101, 2005.

PRABHAKAR, S., MELNIK, R.. Spin Relaxation in GaAs Based Quantum Dots for Security and Quantum Information Processing Applications, Nanomaterials for Security, NATO Science for Peace and Security Series A: Chemistry and Biology, p. 25-33, 2016.

PRADO, S. J.; TRALLERO-GINER, C.; ALCALDE, A. M.; LÓPEZ-RICHARD, V.; MARQUES, G. E.. Optical transitions in a single CdTe spherical quantum dot. Physical Review B, v. 68, p. 235327, 2003.

PRADO, S. J. Influence of Strain and Spin-Orbit Interaction in a Cylindrical Quantum Point. SEMINA Journal: Exact and Technological Sciences, Londrina, v. 36, n. 1, p. 89-96, 2015. DOI: http://dx.doi.org/10.5433/1679-0375.2015v36n1p89.

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Publicado

2020-12-11

Como Citar

Prado, S. J. (2020). Estudo das propriedades ópticas em pontos quânticos de CdTe carregados. Semina: Ciências Exatas E Tecnológicas, 41(2), 205–210. https://doi.org/10.5433/1679-0375.2020v41n2p205

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