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
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