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Science. 2000 Jul 21;289(5478):415-419.

An All-Dielectric Coaxial Waveguide.

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  • 1Center for Materials Science and Engineering and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.


An all-dielectric coaxial waveguide that can overcome problems of polarization rotation and pulse broadening in the transmission of optical light is presented here. It consists of a coaxial waveguiding region with a low index of refraction, bounded by two cylindrical, dielectric, multilayer, omnidirectional reflecting mirrors. The waveguide can be designed to support a single mode whose properties are very similar to the unique transverse electromagnetic mode of a traditional metallic coaxial cable. The new mode has radial symmetry and a point of zero dispersion. Moreover, because the light is not confined by total internal reflection, the waveguide can guide light around very sharp corners.

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