Abstract

Distributed Bragg Reflectors (DBR) are widely used for photonic devices. Applications include VCSELs, filtering and Wavelength Division Multiplexing (WDM).^1,2 The performance of DBRs (e.g., bandwidth and reflectivity) improves with the index contrast of the materials. However, losses also increase, as a consequence of light diffraction in the low-index regions. Conventional solutions for reducing losses are usually either reduction of index contrast or an excessive shortening of the low-index region,^3,4 both leading to a decrease in device performance.

© 2002 Optical Society of America