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Narrow-Band Waveguide Taps Using Photonic Surface Modes Supported by Multilayer Dielectric Stacks

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Abstract

A necessary element, in applications where a widely tunable narrow-band filter is required (e.g., over wavelength at fixed mode index, or over mode index at fixed wavelength), is a structure that supports highly dispersive guided modes whose index may be varied at fixed wavelength. These requirements are satisfied by the photonic surface modes (PSM’s) supported on multilayer dielectric stacks. PSM’s are guided by the interface between a multilayer stack and a low index external medium1,2,3,4. They appear within the photonic band gap or stop-band of the stack, and are confined by total internal reflection and Bragg reflection.

© 1995 Optical Society of America

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