| 摘要 |
PROBLEM TO BE SOLVED: To obtain a waveguide capable of guiding light with a single mode and a mode having desired intensity distribution in a desired frequency band. SOLUTION: Figures (b)-(d) are an xy cross section of a waveguide structure B in sections i, ii and iii respectively. The waveguide structure B has a linear defective part (a first linear defective part) 20 extending in the y axis direction inside a woodpile structure. It also includes second linear defective parts 200-203 which are situated in a layer different from the one where the linear defective part 20 is formed and which are formed by altering a part of the columnar structure extending in the y axis direction. The first linear defective part 20 is a region with no columnar structure exists, a part of which is removed in the first layer 101. The second linear defective parts 200-203 are those with the columnar structure width varied in a part of the columnar structure in a third layer 103; in other words, those with the shapes varied. COPYRIGHT: (C)2007,JPO&INPIT |
