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

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 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.

[1]  P Lalanne,et al.  Modal-reflectivity enhancement by geometry tuning in Photonic Crystal microcavities. , 2005, Optics express.

[2]  Philippe Lalanne,et al.  Ultra-high-reflectivity photonic-bandgap mirrors in a ridge SOI waveguide , 2006 .

[3]  P. Lalanne,et al.  Short Bragg mirrors with adiabatic modal conversion , 2002 .

[4]  Amnon Yariv,et al.  Transmission characteristics of a Fabry-Perot etalon-microtoroid resonator coupled system. , 2006, Optics letters.

[5]  P. Dumon,et al.  Basic structures for photonic integrated circuits in Silicon-on-insulator. , 2004, Optics express.

[6]  Michal Lipson,et al.  Electrooptic modulation of silicon-on-insulator submicrometer-size waveguide devices , 2003 .

[7]  M. Lipson,et al.  Low-power-consumption short-length and high-modulation-depth silicon electrooptic modulator , 2003 .

[8]  S. Combrie,et al.  Detailed analysis by Fabry-Perot method of slab photonic crystal line-defect waveguides and cavities in aluminium-free material system. , 2006, Optics express.

[9]  H. Chong,et al.  Tuning of photonic crystal waveguide microcavity by thermooptic effect , 2004, IEEE Photonics Technology Letters.

[10]  Richard M. De La Rue,et al.  One-dimensional periodic photonic crystal microcavity filters with transition mode-matching features, embedded in ridge waveguides , 2003 .

[11]  Philippe Lalanne,et al.  Bloch-wave engineering for high-Q, small-V microcavities , 2003 .

[12]  Susumu Noda,et al.  Fine-tuned high-Q photonic-crystal nanocavity. , 2005, Optics express.

[13]  Shinpei Ogawa,et al.  Semiconductor three-dimensional and two-dimensional photonic crystals and devices , 2002 .

[14]  Qianfan Xu,et al.  All-optical logic based on silicon micro-ring resonators. , 2007, Optics express.

[15]  Thomas F. Krauss,et al.  Photonic crystals in the optical regime — past, present and future , 1999 .

[16]  P. Lalanne,et al.  Photonic crystal waveguides: Out-of-plane losses and adiabatic modal conversion , 2001 .

[17]  M. Notomi,et al.  Extremely large group-velocity dispersion of line-defect waveguides in photonic crystal slabs. , 2001, Physical review letters.

[18]  R. C. Williamson,et al.  Submicrosecond submilliwatt silicon-on-insulator thermooptic switch , 2004, IEEE Photonics Technology Letters.