Abstract
We present an evaluation of the parameters involved in designing low-loss right-angle waveguide bends based on a high index contrast materials system. We apply the finite difference time domain method (FDTD) to several two-dimensional bend structures and study the effects of varying the bend geometry. Such a study is relevant for the understanding of bend mechanisms and for the optimization and fabrication of high-density high-contrast integrated optical components. The study indicates that high bend transmission can be achieved with the addition of a low-Q resonant cavity; however, similar or even better performance can be achieved with a structure that combines a corner mirror with a phase retarder. The use of a double corner mirror structure is shown to further increase the bend transmission, with little increase in bend area.
| Original language | English |
|---|---|
| Pages (from-to) | 517-528 |
| Number of pages | 12 |
| Journal | Optics Express |
| Volume | 8 |
| Issue number | 9 |
| Publication status | Published - 2001 |
| Externally published | Yes |