Optical Add-Drop Filters Based on Photonic Crystal Ring Resonators

Abstract

We present here an optical add-drop filter (ADF) design based on ultra-compact photonic crystal ring resonators (PCRRs). The normalized transmission spectra for single-ring and dual-ring configurations have been investigated by using the two-dimensional finite-difference time-domain (FDTD) technique in a square lattice dielectric-rod photonic-crystal structure. With the introduction of four scatterers at the corners of quasisquare-ring PCRR, high wavelength selectivity and close to 100% drop efficiency can be obtained. Both backward- and forward-dropping were achieved by controlling the coupling efficiency between two PCRR rings for resonant modes with different symmetry. The resonant-mode quality factor Q and the wavelength tunability were also analyzed, opening opportunities for PCRRs as ultra-compact filters, optical add-drop multiplexers, electrooptical N x N switches and electrooptical modulators.

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Document Details

Document Type
Technical Report
Publication Date
Feb 19, 2007
Accession Number
ADA483193

Entities

People

  • Richard Soref
  • Weidong Zhou
  • Zexuan Qiang

Organizations

  • University of Texas at Arlington

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Cavity Resonators
  • Couplings
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Efficiency
  • Electrical Engineering
  • Finite Difference Time Domain
  • Frequency
  • Integrated Circuits
  • Optics
  • Photonic Crystals
  • Resonance
  • Resonators
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Integrated Circuit Design and Technology.
  • Microwave Engineering.
  • Solar Photovoltaics and Thermoelectric Devices.