The Omniguide: An All-Dielectric Hollow Waveguide

The recent emergence of a dielectric omnidirectional multilayer structure1-3 opens new opportunities for low loss broadband guiding of light in air. Light guided in a hollow waveguide lined with an omnidirectional reflecting film will propagate primarily through air and will therefore have substantially lower absorption losses. In addition, the confinement mechanism does not have angular dependence which allows the light to be guided around sharp bends with little or no leakage.

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