| 1. |
- Kupresak, Mario, et al.
(författare)
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Hydrodynamic approach for deep-nanometer scale topologies: Analysis of metallic shell
- 2021
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Ingår i: 2020 International Symposium on Antennas and Propagation, ISAP 2020. ; , s. 269-270
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Konferensbidrag (refereegranskat)abstract
- In order to describe light-matter interaction at deep-nanometer scale, which is governed by nonclassical phenomena, a semiclassical hydrodynamic model with additional boundary conditions has been introduced. This model investigates the motion of the charged gas in metals, characterized by nonlocal material parameters. Based on different treatments of the nonlocality, several hydrodynamic models have been proposed. This work employs the hard wall hydrodynamic model (HW-HDM) and the quantum hydrodynamic model (Q-HDM). The study is performed for the mode structure (natural modes) of a spherical metallic nanoshell, supplemented by the plane wave response of the system. It is shown that the main transverse resonances of HW-HDM and Q-HDM experience nearly identical blueshifts in comparison to the classical resonances. The corresponding longitudinal resonances show noticeable spectrum shifts.
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| 2. |
- Kupresak, Mario, et al.
(författare)
-
Nonlocal Hydrodynamic Response of Plasmonic Structures at Deep-nanometer Scale
- 2020
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Ingår i: Proceedings Elmar - International Symposium Electronics in Marine. - 1334-2630. ; 2020-September, s. 1-4
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Konferensbidrag (refereegranskat)abstract
- The electromagnetic properties of plasmonic nano-Antennas and scatterers with the characteristic dimensions at deep-nanometer scale, governed by quantum mechanical effects, have been extensively studied by a hydrodynamic approach. Several hydrodynamic models, together with additional boundary conditions, have been proposed to deal with the collective motion of the free electron gas in metals. In this work, four hydrodynamic models, namely the hard-wall hydrodynamic model, the curl-free hydrodynamic model, the shear forces hydrodynamic model, and the quantum hydrodynamic model are employed. The study is performed for a deep-nanometer metal core-dielectric shell sphere, excited by a plane wave. It is demonstrated that the far field characteristics of the core-shell nanosphere are largely affected by the choice of a specific hydrodynamic model.
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| 3. |
- Kupresak, Mario, et al.
(författare)
-
Nonlocal Response of Plasmonic Nanostructures Excited by Dipole Emitters
- 2021
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Ingår i: Proceedings Elmar - International Symposium Electronics in Marine. - 1334-2630. ; 2021-September, s. 25-28
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Konferensbidrag (refereegranskat)abstract
- The interaction between light and plasmonic structures at the deep-nanometer scale, which is essentially governed by nonclassical effects, has been increasingly investigated by the hydrodynamic model. Several hydrodynamic models have been introduced, in order to describe the motion of the free electron gas in metals. In this work, by employing the hard wall hydrodynamic model (HW-HDM) and the quantum hydrodynamic model (Q-HDM), the nonlocal response of an isolated metallic nanoparticle, excited by a dipole emitter, is investigated. The analysis is performed for the local density of states of an emitter coupled with a spherical nanoparticle, which may be treated analytically. Both radial and tangential emitters are studied, while varying the emitter-nanoparticle separation, and the nanoparticle's size and material. It is shown that HW-HDM and Q-HDM may generate striking spectral features, which do not arise within the classical approach.
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| 4. |
- Marinovic, Tomislav, 1991, et al.
(författare)
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On the convergence of the iterative gauss-seidel-based electric field algorithm for the solution of antenna array mutual coupling
- 2021
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Ingår i: 2020 International Symposium on Antennas and Propagation, ISAP 2020. ; , s. 271-272
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Konferensbidrag (refereegranskat)abstract
- Recently, a new method for the solution of the antenna array mutual coupling (MC), which is based on the field data of an isolated element and relates to the iterative Gauss-Seidel method, has been proposed. In this paper, we study the convergence of the proposed method by comparing it with the convergence of the classical Gauss-Seidel iteration applied to a method-of-moments (MoM) system. Despite several approximations being used in the field-based method, similar behavior between the two methods has been observed, both in terms of the stability and the rate of the convergence.
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