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Light wheel confined in a purely dielectric composite waveguide
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-3401-1125
2009 (English)In: Optics Express, ISSN 1094-4087, Vol. 17, no 6, 4348-4354 p.Article in journal (Refereed) Published
Abstract [en]

A properly designed composite waveguide consisting of a one-dimensional photonic crystal waveguide and a conventional dielectric waveguide is proposed for the realization of a localized "light wheel". Light confinedly rotating between the two waveguides is numerically demonstrated and explained physically in detail. A delocalized "light wheel" is found at the band gap edge caused by contra-directional coupling between the two waveguides. Because of this delocalized "light wheel", the composite waveguide can be used to trap light as a cavity, and a quality factor of 9 x 10(3) is achieved as an example. The present structure is completely dielectric and thus easy to realize with a low loss.

Place, publisher, year, edition, pages
2009. Vol. 17, no 6, 4348-4354 p.
Keyword [en]
2-dimensional photonic crystal, square-lattice, couplers
URN: urn:nbn:se:kth:diva-18318ISI: 000264747300015ScopusID: 2-s2.0-62549125981OAI: diva2:336364
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2013-11-19Bibliographically approved

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