Channel drop filters with folded directional couplers in two-dimensional photonic crystals

Chun Chih Wang, Lien Wen Chen

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

In this paper, we proposed a three-port channel drop filter (CDF) with a folded directional coupler (FDC) in a two dimensional photonic crystal. The filter consists of two major parts, one is a resonator formed by a cavity defect to catch the desired signal from the bus waveguide, and the other one composed of two line defects close to form a directional coupler is to work as an frequency-dependent mirror for enhancement of the drop efficiency. The frequency response of the CDF has been derived by the couple-mode theory and the highly efficient drop conditions have been discussed. Numerical simulations obtained by the finite-difference time-domain method confirmed the feasibility of the CDF.

Original languageEnglish
Pages (from-to)1210-1215
Number of pages6
JournalPhysica B: Condensed Matter
Volume405
Issue number4
DOIs
Publication statusPublished - 2010 Feb 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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