Tapered Photonic Crystal Microcavities Embedded in Photonic Wire Waveguides With Large Resonance Quality-Factor and High Transmission

Ahmad Rifqi Md Zain, Marco Gnan, Harold M. H. Chong, Marc Sorel, Richard M. De La Rue
2008 IEEE Photonics Technology Letters  
We present the design, fabrication, and characterization of a microcavity that exhibits simultaneously high transmission and large resonance quality-factor (Q-factor). This microcavity is formed by a single-row photonic crystal (PhC) embedded in a 500-nm-wide photonic wire waveguide-and is based on silicon-on-insulator. A normalized transmission of 85%, together with a Q-factor of 18 500, have been achieved experimentally through the use of carefully designed tapering on both sides of each of
more » ... sides of each of the hole-type PhC mirrors that form the microcavity. We have also demonstrated reasonably accurate control of the cavity resonance frequency. Simulation of the device using a three-dimensional finite-difference time-domain approach shows good agreement with the experimental results. Index Terms-Microcavities, photonic crystal (PhC), photonic wires (PhWs), quality-factor ( -factor), silicon-on-insulator (SOI).
doi:10.1109/lpt.2007.910621 fatcat:36fkkxfmdjgzxff6d44nvaiude