Enhanced transmission and beaming via a zero-index photonic crystal

Journal Article · Mon Jul 18 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4959085· OSTI ID:22594412

Hajian, Hodjat ^[1]; Ozbay, Ekmel ^[1]; Caglayan, Humeyra ^[1]

---

1. Nanotechnology Research Center, Bilkent University, 06800 Ankara (Turkey)

Certain types of photonic crystals with Dirac cones at the Γ point of their band structure have a zero effective index of refraction at Dirac cone frequency. Here, by an appropriate design of the photonic structure, we obtain a strong coupling between modes around the Dirac cone frequency of an all-dielectric zero-index photonic crystal and the guided ones supported by a photonic crystal waveguide. Consequently, we experimentally demonstrate that the presence of the zero-index photonic crystal at the inner side of the photonic crystal waveguide leads to an enhancement in the transmission of some of the guided waves passing through this hybrid system. Moreover, those electromagnetic waves extracted from the structure with enhanced transmission exhibit high directional beaming due to the presence of the zero-index photonic crystal at the outer side of the photonic crystal waveguide.

• OSTI ID: 22594412
• Journal Information: Applied Physics Letters, Vol. 109, Issue 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
DIELECTRIC MATERIALS
DIRAC FORM FACTORS
ELECTROMAGNETIC RADIATION
HYBRID SYSTEMS
HYBRIDIZATION
REFRACTIVE INDEX
STRONG-COUPLING MODEL
TRANSMISSION
WAVEGUIDES