Patent ID: 7780863

Claim:
A method of fabricating a hollow waveguide having a cyclic geometric structure, comprising steps of: (a) obtaining a first material and a second material, said first material and said second material having two different refractive indexes separately; (b) processing a film deposition to obtain a first film having a first refractive index and a second film having a second refractive index on an object, said first film having said first refractive index being made of said first material, said second film having said second refractive index being made of said second material; (c) after depositing said second film having said second refractive index, etching a ring-like waveguide pattern on said object deposited with said first film having said first refractive index and said second film having said second refractive index; (d) repeating step (b) and step (c) for a plurality of times to obtain a plurality of films consisting of pairs of the first film having the first refractive index and the second film having the second refractive index; and (e) arranging said plurality of film pairs to obtain a hollow waveguide having a cyclic geometric structure of the ring-like waveguide patterns, wherein an electromagnetic wave is transmitted in a confined hollow center of said hollow waveguide.