Abstract
One-dimensional (1D) photonic crystal (PC) microcavities can be readily embedded into silicon-on-insulator waveguides for photonic integration. Such structures are investigated by 2D Finite-Difference Time-Domain method to identify designs with high transmission which is essential for device integration. On-resonance transmission is found to decrease with the increasing mirror pairs, however, the quality factor (Q) increases to a saturated value. The addition to the Bragg mirrors of tapered periods optimized to produce a cavity mode with a near Gaussian shaped envelope results in a major reduction in vertical loss. Saturated Q up to 2.4 106 is feasible if the internal tapers are properly designed. The effect of increasing transmission is also demonstrated in a structure with the external tapers.
| Original language | English |
|---|---|
| Pages (from-to) | 19-25 |
| Number of pages | 7 |
| Journal | Photonics and Nanostructures - Fundamentals and Applications |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Feb 2009 |
Keywords
- Time domain analysis
- Method of moments
- Crystal filters
- Two dimensional
- Microcavities
- Photonic crystals
- Q factor measurement
- Mirrors
- Crystal atomic structure