Direct numerical and experimental determination of group index dispersion in photonic crystal waveguides

Andrei Lavrinenko, Rune Shim Jacobsen, Jacob Fage-Pedersen, Beata Zsigri, Christophe Peucheret, Lars Hagedorn Frandsen, Martin Kristensen, Peter Ingo Borel

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

We report on direct numerical calculations and experimental measurements of the group-index dispersion in a photonic crystal waveguide fabricated in silicon-on-insulator material. The photonic crystal is defined by a triangular arrangement of holes and the waveguide is carved out by introducing a one-row line defect. Both the numerical and experimental methods are based on the time of flight approach for an optical pulse. An increase of the group index by approximately 45 times (from 4 to 155) has been observed when approaching the cutoff of the fundamental photonic bandgap mode. Numerical 2D and 3D simulations of pulse dynamics in the waveguide made by the time-domain method shows excellent agreement with measured data in most of the band. These group index values in a photonic crystal waveguide are to the best of our knowledge the largest numbers reported so far by direct tracking of pulse propagation.
Original languageEnglish
Title of host publicationProceedings of SPIE
EditorsWaclaw Urbanczyk, Bozena Jaskorzynska, Philip St. J. Russell
Volume5950
PublisherSPIE
Publication date2005
ISBN (Print)0-8194-5957-7
Publication statusPublished - 2005
EventOptics and Optoelectronics - Warsaw, Poland
Duration: 1 Jan 2005 → …

Conference

ConferenceOptics and Optoelectronics
CityWarsaw, Poland
Period01/01/2005 → …

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