We study the potential for controlled transfer of population to the biexciton state of a semiconductor quantum dot coupled with a metal nanoparticle, under the influence of an electromagnetic pulse with hyperbolic secant shape, and derive analytical solutions of the density matrix equations for both zero and nonzero biexciton energy shifts. These solutions lead to efficient transfer to the biexciton state for various interparticle distances including relatively small values. In certain cases, when the distance between the two particles is small, the transfer of population is strongly modified because of the influence of surface plasmons to the excitons, and the effect is more pronounced for shorter pulses. The hybrid nanostructure that we study has been proposed for generating efficient polarization-entangled photons, and thus, the successful biexciton state preparation considered here is expected to contribute in this line of research.
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14 June 2021
Research Article|
June 09 2021
Coherent preparation of the biexciton state in a semiconductor quantum dot coupled to a metallic nanoparticle
Emmanuel Paspalakis
;
Emmanuel Paspalakis
a)
Materials Science Department, School of Natural Sciences, University of Patras
, Patras 26504, Greece
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Athanasios Smponias
;
Athanasios Smponias
Materials Science Department, School of Natural Sciences, University of Patras
, Patras 26504, Greece
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Dionisis Stefanatos
Dionisis Stefanatos
b)
Materials Science Department, School of Natural Sciences, University of Patras
, Patras 26504, Greece
b)Author to whom correspondence should be addressed: dionisis@post.harvard.edu
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a)
Electronic mail: paspalak@upatras.gr
b)Author to whom correspondence should be addressed: dionisis@post.harvard.edu
J. Appl. Phys. 129, 223104 (2021)
Article history
Received:
April 12 2021
Accepted:
May 22 2021
Citation
Emmanuel Paspalakis, Athanasios Smponias, Dionisis Stefanatos; Coherent preparation of the biexciton state in a semiconductor quantum dot coupled to a metallic nanoparticle. J. Appl. Phys. 14 June 2021; 129 (22): 223104. https://doi.org/10.1063/5.0053859
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