Enhanced quantum efficiency and Purcell factor of incoherent light-emitting source modulators coupled with nanoantennas : DDA modeling and optimization

Mota, Achiles Fontana da; Mosallaei, Hossein

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Campo DC	Valor	Idioma
dc.contributor.author	Mota, Achiles Fontana da	-
dc.contributor.author	Mosallaei, Hossein	-
dc.date.accessioned	2023-10-06T18:47:16Z	-
dc.date.available	2023-10-06T18:47:16Z	-
dc.date.issued	2022-12-12	-
dc.identifier.citation	MOTA, Achiles Fontana da; MOSALLAEI, Hossein. Enhanced quantum efficiency and Purcell factor of incoherent light-emitting source modulators coupled with nanoantennas: DDA modeling and optimization. Journal of the Optical Society of America B, [s. l.], v. 40, n. 1, p. 94-107, 2023. DOI: https://doi.org/10.1364/JOSAB.476746. Disponível em: https://opg.optica.org/josab/abstract.cfm?uri=josab-40-1-94. Acesso em: 06 out. 2023.	pt_BR
dc.identifier.uri	http://repositorio2.unb.br/jspui/handle/10482/46635	-
dc.language.iso	eng	pt_BR
dc.publisher	Optica Publishing Group	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Enhanced quantum efficiency and Purcell factor of incoherent light-emitting source modulators coupled with nanoantennas : DDA modeling and optimization	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Fotônica	pt_BR
dc.subject.keyword	Ondas eletromagnéticas	pt_BR
dc.subject.keyword	Emissores quânticos	pt_BR
dc.rights.license	© 2022 Optica Publishing Group	pt_BR
dc.identifier.doi	https://doi.org/10.1364/JOSAB.476746	pt_BR
dc.relation.publisherversion	https://opg.optica.org/josab/viewmedia.cfm?uri=josab-40-1-94&seq=0	pt_BR
dc.description.abstract1	Gated tunable materials-based devices have proven efficient structures to dynamically control quantum emitters’ (QEs) photonic density of states. The active permittivity control enabled by these materials allows manipulating the coupling and dissipation of evanescent modes radiated by the QE, hence controlling the emission parameters. In this sense, we propose here the design and optimization of a plasmonic device coupled with nanoantennas capable of dynamically manipulating the QEs’ emission at visible wavelengths using a thin gated doped titanium nitrate layer. We explore the use of metallic cubic and bow-tie antennas and study their unique characteristics related to enhancing the QEs’ emission. For the nanoantenna geometrical parameters optimization, we propose a discretedipole-approximation (DDA) method to accurately calculate all the radiation parameters of a QE embedded in a layered medium coupled to a nanoantenna. This technique allows calculating the decay behavior of QEs arbitrarily distributed, which is only feasible with knowledge of the Purcell factor and quantum efficiency mapped for all possible positions, easily achieved with the proposed model. We show that by employing the proposed DDA, the time required for optimizing and building those maps to evaluate the device’s response is drastically reduced (98%) compared to conventional numerical techniques. Using the DDA to optimize the antenna allowed the device’s quantum efficiency to be enhanced from 1.8% (no nanoantenna) to 8% and 10.5% using the cubic and bow-tie nanoantenna, respectively. In addition, the nanoantenna helps decrease the QE lifetime by a factor of approximately 2, allowing faster modulation speeds. Finally, our modeling and findings can be used to pave the way for the design of new gated optical modulators coupled with nanoantennas for applications that require amplitude modulation.	pt_BR
dc.identifier.orcid	https://orcid.org/0000-0003-1221-1801	pt_BR
dc.contributor.email	a.damota@northeastern.edu	pt_BR
dc.contributor.affiliation	Northeastern University, Department of Electrical Engineering	pt_BR
dc.contributor.affiliation	University of Brasília, Department of Electrical Engineering	pt_BR
dc.contributor.affiliation	University of Brasília, Department of Electrical Engineering	pt_BR
dc.description.unidade	Faculdade de Tecnologia (FT)	pt_BR
dc.description.unidade	Departamento de Engenharia Elétrica (FT ENE)	pt_BR
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