Infrared hollow waveguides utilizing a dielectric multilayer are examined by use of a photonic bandgap theory. It is shown that, in the waveguide consisting of quarter-wave film stack, the act of covering the dielectric films with a metal layer is effective in the reduction of the number of film layers. To verify the effect of this design, we fabricated a prototype waveguide with three dielectric layers of SiO2/Ta2O5/SiO2 and a silver layer by using a liquid-phase coating technique. From the loss spectrum of the fabricated waveguide, it is confirmed that, as designed, the waveguide shows wideband low-loss property at the wavelength of Nd:YAG laser light 1.06 μm.
© 2002 Optical Society of America
[Optical Society of America ]
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(230.3990) Optical devices : Micro-optical devices
(310.1620) Thin films : Interference coatings
Takashi Katagiri, Yuji Matsuura, and Mitsunobu Miyagi, "Metal-covered photonic bandgap multilayer for infrared hollow waveguides," Appl. Opt. 41, 7603-7606 (2002)