Abstract

Micro-sized resonant cavities in the form of pillars have been of recent interest for WDM channel add-drop filters due to their high-Q resonances. Square micro-pillar (µ-pillar) resonators that have four-bounce orbits confined by total internal reflection have the advantage of long interaction length along the cavity flat sidewalls [1]. Prism coupling to whispering-gallery modes of a square µ-pillar cavity has been studied for the dependence of the submicrometer evanescent-coupling gap [2]. Here we report the results of square µ-pillar cavity resonances with a maximum coupling efficiency ≈ 97% using angle-resolved prism coupling technique.

© 2003 Optical Society of America