Two-dimensional photonic crystal
First Claim
1. A two-dimensional photonic crystal having a slab-shaped body in which modified refractive index areas, which have the same shape and whose refractive index differs from that of the body, are cyclically arranged, which is characterized in that:
- a plane shape of each modified refractive index area is a polygon whose corners are removed.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a two-dimensional photonic crystal in which an absolute photonic band gap (PBG), i.e. a photonic band gap that is effective for both the TE-polarized light and the TM-polarized light within a predetermined wavelength range, is created with an adequate bandwidth. The body 21 is provided with holes 22 arranged in a triangular lattice pattern, where the basic shape of the hole is an equilateral triangle. This shaping and arranging of the holes creates an absolute PBG. Each corner of the equilateral triangle is cut along an arc to leave an adequate distance between the neighboring holes (i.e. an adequate width of the connecting portion of the body). This design makes it possible to enlarge each hole 22 while ensuring an adequate strength of the two-dimensional photonic crystal. This construction creates an absolute PBG having a large width.
-
Citations
11 Claims
-
1. A two-dimensional photonic crystal having a slab-shaped body in which modified refractive index areas, which have the same shape and whose refractive index differs from that of the body, are cyclically arranged, which is characterized in that:
a plane shape of each modified refractive index area is a polygon whose corners are removed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification