The role of cladding bilayer material compositions to obtain low-loss hollow-core integrated optical waveguides was studied. Using the simple Fresnel reflection formulae, the optimal material composition was determined. It is shown that using bilayers with higher index-contrast does not always lead to a lower loss for (quasi-)linearly polarized modes. Based on that knowledge, structures that exhibit very low leakage loss for quasi-TE00 mode are proposed and designed using Si-compatible materials.
- Anti-resonant reflecting optical waveguide Hollow waveguide Integrated optics Leaky waves
Uranus, H. P., Hoekstra, H., & van Groesen, E. W. C. (2006). Considerations on material composition for low-loss hollow-core integrated optical waveguides. Optics communications, 260(2/2), 577-582. https://doi.org/10.1016/j.optcom.2005.11.032