The emergence of a dielectric omnidirectional multilayer structure - opens new opportunities for low loss broad-band guiding of light in air. We demonstrate the effectiveness of such an approach by fabricating a broad-band, low-loss hollow waveguide in the 10-m region and measuring its transmission around a 90 bend. The generality of the solution enables the application of the method to many wavelengths of interest important in telecommunication applications as well as for guiding high-power lasers in medical and other fields of use.
Yoel Fink, Daniel J. Ripin, Shanhui Fan, Chiping Chen, John D. Joannopoulos, and Edwin L. Thomas, "Guiding Optical Light in Air Using an All-Dielectric Structure," J. Lightwave Technol. 17, 2039- (1999)