Independent control of upper and lower cutoff frequencies in two-dimensional photonic crystal waveguides

Xiyao Chen, Peijun Yao, Bo Chen, Feng Li, Anting Wang, Liang Lv, Jiangying Zhang, Hai Ming

Research output: Journal article publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

The independent control of the upper and lower cutoff frequencies of the guided modes in coupled-cavity wavguides (CCWs) is investigated numerically. The CCWs are formed in a two-dimensional photonic crystal (2D PhC) consisting of a square array of dielectric rods in the air. The dielectric constant and radius of the rods in the perfect PhC is 11.56 and 0.18a, respectively, in which a is lattice constant. By using the plane wave expansion method (PWEM), the impact of two influencing factors on cutoff frequencies in CCWs is calculated systematically. Efficient methods have been demonstrated for tuning one cutoff frequency while keeping the other unchanged. The indepent control ranges of the upper and lower cutoff can be up to 67.85% and 68.57% of photonic band gap (PBG), respectively. The results can be applied to the design of PhC-based optical devices such as band filters and optical switches.

Original languageEnglish
Article number67
Pages (from-to)353-359
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5624
DOIs
Publication statusPublished - 6 May 2005
Externally publishedYes
EventSemiconductor and Organic Optoelectronic Materials and Devices - Beijing, China
Duration: 9 Nov 200411 Nov 2004

Keywords

  • Coupled-cavity waveguide
  • Cutoff frequency
  • Dispersion relation
  • Photonic crystal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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