E-Locus - Institutional Repository of the University of Crete

Home Search

Results - Details

Search command : Author="Ρεμεδιάκης" And Author="Ιωάννης"

Current Record: 12 of 47

[Add to Basket]

Identifier

000448338

Title

Electromagnetic wave propagation in photonic crystals and metamaterials

Alternative Title

Διάδοση ηλεκτρομαγνητικών κυμάτων σε φωτονικούς κρυστάλλους και μεταυλικά

Author

Μαβίδης, Χαράλαμπος

Thesis advisor

Καφεσάκη, Μαρία

Reviewer

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

Language

English

Subject

Absorbers

Metasurfaces

Photonic crystals

Απορρόφηση

Μεταεπιφάνειες

Πυκνότητα καταστάσεων

Σκέδαση ηλεκτρομαγνητικής ακτινοβολίας

Φωτοτικοί κρύσταλλοι

Issue date