Transforming guided waves with metamaterial waveguide cores

Sophie Viaene, Vincent Ginis, Jan Danckaert, Philippe Tassin

Research output: Chapter in Book/Report/Conference proceedingConference paper

1 Citation (Scopus)

Abstract

Metamaterials make use of subwavelength building blocks to enhance our control on the propagation of light. To determine the required material properties for a given functionality, i.e., a set of desired light flows inside a metamaterial
device, metamaterial designs often rely on a geometrical design tool known as transformation optics. In recent years, applications in integrated photonics motivated several research groups to develop two-dimensional versions of
transformation optics capable of routing surface waves along graphene-dielectric and metal-dielectric interfaces. Although guided electromagnetic waves are highly relevant to applications in integrated optics, no consistent transformation-optical framework has so far been developed for slab waveguides. Indeed, the conventional application of transformation optics to dielectric slab waveguides leads to bulky three-dimensional devices with metamaterial implementations both inside and outside of the waveguide’s core. In this contribution, we develop a transformationoptical framework that still results in thin metamaterial waveguide devices consisting of a nonmagnetic metamaterial core of varying thickness [Phys. Rev. B 93.8, 085429 (2016)]. We numerically demonstrate the effectiveness and
versatility of our equivalence relations with three crucial functionalities: a beam bender, a beam splitter and a conformal lens. Our devices perform well on a qualitative (comparison of fields) and quantitative (comparison of transmitted
power) level compared to their bulky counterparts. As a result, the geometrical toolbox of transformation optics may lead to a plethora of integrated metamaterial devices to route guided waves along optical chips.
Original languageEnglish
Title of host publicationMetamaterials X
PublisherSPIE
Number of pages8
ISBN (Print)9781510601284
Publication statusPublished - 18 Apr 2016
EventSPIE Photonics Europe 2016: Optics, Photonics and Digital Technologies for Imaging Applications IV - Square, Brussels, Belgium
Duration: 3 Apr 20167 Apr 2016
Conference number: 9896
http://spie.org/conferences-and-exhibitions/photonics-europe

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9883
ISSN (Print)0277-786X

Conference

ConferenceSPIE Photonics Europe 2016
CountryBelgium
CityBrussels
Period3/04/167/04/16
Internet address

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