Abstract
A slow-group-velocity- and low-group-velocity-dispersion photonic crystal slab waveguide is designed by using capsule-shaped air holes in hexagonal lattice. The theoretical study shows that adjusting the aspect ratio of holes in the innermost rows can fine-tune the dispersion tail. The presented design can achieve nearly flat-band photonic crystal waveguides with group index of 2136 over the normalized bandwidth (Δω / ω) of 1.380.4. We also discuss the effects of the change in the holes aspect ratio combined with a slight size adjustment. The group index in the range of 2143 for normalized bandwidth of about 1.50.3 is obtained with the combination effect. The optimized designed exhibits a nearly constant group index of 21 over 22.7 nanometer bandwidth at λ = 1.55μm.
| Original language | English (US) |
|---|---|
| Article number | 5256334 |
| Pages (from-to) | 1510-1514 |
| Number of pages | 5 |
| Journal | IEEE Journal on Selected Topics in Quantum Electronics |
| Volume | 15 |
| Issue number | 5 |
| DOIs | |
| State | Published - Sep 2009 |
| Externally published | Yes |
Keywords
- Group velocity dispersion
- Photonic crystal waveguide
- Slow group velocity
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering