Compact Optical Switches and Modulators Based on Dispersion Engineered Photonic Crystals

Liam O'Faolain, Daryl M. Beggs, Thomas P. White, Tobias Kampfrath, Kobus Kuipers, Thomas F. Krauss

Research output: Contribution to journalArticlepeer-review

Abstract

We use slow-light photonic crystals to enhance optical switching and modulation in silicon. By using dispersion-engineered designs, a switch as short as 5 mu m was achieved, in which we have demonstrated rerouting of optical pulses on a 3-ps time scale through the absorption of a femtosecond pulse. We additionally demonstrate a modulator with a Mach-Zehnder interferometer (MZI) configuration with flat-band slow-light photonic crystal phase shifters that is designed to give a large group-index-bandwidth product. An extinction ratio in excess of 15 dB is obtained over the entire 11-nm bandwidth of the modulator.

Original languageEnglish
Pages (from-to)404-414
Number of pages11
JournalIEEE Photonics Journal
Volume2
Issue number3
DOIs
Publication statusPublished - Jun 2010

Keywords

  • Engineered photonic nanostructures
  • ultrafast nonlinear processes
  • nonlinear effects
  • slow light
  • silicon nanophotonics
  • photonic crystals
  • BAND SLOW LIGHT
  • WAVE-GUIDES
  • SILICON
  • POWER
  • CHIP
  • TEMPERATURE
  • BANDWIDTH
  • CAPACITOR
  • NETWORKS

Fingerprint

Dive into the research topics of 'Compact Optical Switches and Modulators Based on Dispersion Engineered Photonic Crystals'. Together they form a unique fingerprint.

Cite this