Abstract
Square-shaped two-dimensional optical microcavities (-cavities) were investigated for possible applications as filters for dense wavelength-division multiplexing. Multimode cavity resonances were observed in the elastic scattering of square-shaped -cavities in fused silica. Based on a two-dimensional -space representation, we accounted for the multimode spectrum by different normal modes with rays confined by total internal reflection. The cavity-mode trajectories need not be closed after each round trip. Single-mode spectra are expected from smaller square-shaped -cavities.
© 2001 Optical Society of America
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