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Identifier |
000448338 |
Title |
Electromagnetic wave propagation in photonic crystals and metamaterials |
Alternative Title |
Διάδοση ηλεκτρομαγνητικών κυμάτων σε φωτονικούς κρυστάλλους και μεταυλικά |
Author
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Μαβίδης, Χαράλαμπος
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Thesis advisor
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Καφεσάκη, Μαρία
|
Reviewer
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Τζωρτζάκης, Στυλιανός
Παπάζογλου, Δημήτριος
Vos Willem
Λοιδωρίκης, Ελευθέριος
Κενανάκης, Γεώργιος
Ρεμεδιάκης, Ιωάννης
|
Abstract |
The great advancements in nanotechnology during the 20th century unveiled numerous,
previously unattainable, applications involving electromagnetic wave propagation
and control. This led to the emergence of man-made composite structures with engineerable
properties through proper structuring, allowing the exploration of previously unexplored
light-matter interaction aspects. Characteristic examples are Photonic Crystals and Metamaterials/
Metasurfaces. In this thesis, three di_erent photonic systems are investigated: (i) The
position dependence of Local Density of States inside a _nite 3D photonic crystal is calculated,
for di_erent trajectories inside the crystal, and a model was derived to obtain a physical understanding
of the calculated response. (ii) The conditions for perfect absorption for planar
structures comprised of a dielectric between a thin resistive _lm and a metallic back-re_ector
are derived, based on a proper extension of the Transfer Matrix Method. Three distinct cases
are investigated, where the resistive thin _lm is a: (a) uniform metal _lm; (b) graphene layer;
(c) metasurface showing both electric and magnetic surface conductivities. (iii) The scattering
properties of multilayered in_nitely-long cylinders are calculated, based on Mie theory combined
with a Transfer Matrix Method formulation, for cylinders incorporating metasurfaces at
their interfaces, and a previously established e_ective medium model is extended for systems/
metamaterials of such cylinders. Three relevant systems are investigated: (a) single-layered
polaritonic cylinders; (b) multi-layered graphene-based nanotubes; and (c) metasurface-based
cylinders. We found the parameters required for di_erent electromagnetic phases in those
systems, including hyperbolic dispersion, double negative response, epsilon near zero response,
etc
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Language |
English |
Subject |
Absorbers |
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Metasurfaces |
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Photonic crystals |
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Απορρόφηση |
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Μεταεπιφάνειες |
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Πυκνότητα καταστάσεων |
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Σκέδαση ηλεκτρομαγνητικής ακτινοβολίας |
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Φωτοτικοί κρύσταλλοι |
Issue date |
2022-07-29 |
Collection
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School/Department--School of Sciences and Engineering--Department of Materials Science and Technology--Doctoral theses
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Type of Work--Doctoral theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/c/1/6/metadata-dlib-1653903892-70362-14337.tkl
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Views |
615 |