Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/785
Title: Full utilization of semi-Dirac cones in photonics
Authors: Kurt, Hamza
Yasa, Utku G.
Turduev, Mirbek
Giden, İbrahim Halil
Keywords: Negative Refraction
Crystals
Metamaterial
Realization
Emission
Point
Zero-refractive-index
Publisher: American Physical Society
Source: Yasa, U. G., Turduev, M., Giden, I. H., & Kurt, H. (2018). Full utilization of semi-dirac cones in photonics. Physical Review B, 97(19) doi:10.1103/PhysRevB.97.195131
Abstract: In this study, realization and applications of anisotropic zero-refractive-index materials are proposed by exposing the unit cells of photonic crystals that exhibit Dirac-like cone dispersion to rotational symmetry reduction. Accidental degeneracy of two Bloch modes in the Brillouin zone center of two-dimensional C2-symmetric photonic crystals gives rise to the semi-Dirac cone dispersion. The proposed C2-symmetric photonic crystals behave as epsilon-and-mu-near-zero materials (eff≈0, μeff≈0) along one propagation direction, but behave as epsilon-near-zero material (eff≈0, μeff≠0) for the perpendicular direction at semi-Dirac frequency. By extracting the effective medium parameters of the proposed C4- and C2-symmetric periodic media that exhibit Dirac-like and semi-Dirac cone dispersions, intrinsic differences between isotropic and anisotropic materials are investigated. Furthermore, advantages of utilizing semi-Dirac cone materials instead of Dirac-like cone materials in photonic applications are demonstrated in both frequency and time domains. By using anisotropic transmission behavior of the semi-Dirac materials, photonic application concepts such as beam deflectors, beam splitters, and light focusing are proposed. Furthermore, to the best of our knowledge, semi-Dirac cone dispersion is also experimentally demonstrated for the first time by including negative, zero, and positive refraction states of the given material. © 2018 American Physical Society.
URI: https://journals.aps.org/prb/pdf/10.1103/PhysRevB.97.195131
https://hdl.handle.net/20.500.11851/785
ISSN: 24699950
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
PhysRevB.97.195131.pdf3.64 MBAdobe PDFThumbnail
View/Open
Show full item record



CORE Recommender

SCOPUSTM   
Citations

6
checked on Mar 23, 2024

WEB OF SCIENCETM
Citations

13
checked on Mar 23, 2024

Page view(s)

60
checked on Mar 25, 2024

Download(s)

30
checked on Mar 25, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.