Suzuki phase in two-dimensional photonic crystals

José Sánchez-Dehesa, Felipe Ramos-Mendieta, Jorge Bravo-Abad, Javier Martí, Alejandro Martínez, Andrés García

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

When rows of cylinders are periodically removed from a hexagonal array of dielectric cylinders, a new two-dimensional (2D) photonic crystal (PC) arises. The new structure consists of a lattice of vacancies embedded in the initial hexagonal lattice. We called it Suzuki Phase because it remains similar structures discovered in the 60's by K. Suzuki studying alkali halides. A plane-wave algorithm as well as a 2D finite difference-time-domain method has been employed to study the photonic properties of this PC as a function of the filling fraction (f) in the case of high dielectric cylinders (ϵ=13.6) in air. For TM-modes, it is shown that in a certain range of f an isolated miniband appears in the gap of the initial hexagonal lattice. The miniband, which is created by the coupling of defect states, is described by a tight-binding formalism with two parameters. Also, the frequencies of the two possible vacancy defects in the SP have been obtained and their symmetry analyzed.

Original languageEnglish
Pages (from-to)251-259
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4655
DOIs
StatePublished - 25 Apr 2002
EventPhotonic Bandgap Materials and Devices 2002 - San Jose, United States
Duration: 19 Jan 200225 Jan 2002

Bibliographical note

Publisher Copyright:
© 2002 SPIE.

Keywords

  • Defect states
  • Hexagonal lattice
  • Photonic crystals
  • Tight binding
  • Vacancy

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