The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2006
Filed:
Mar. 26, 2003
Masayuki Shirane, Tokyo, JP;
Jun Ushida, Tokyo, JP;
Masayuki Shirane, Tokyo, JP;
Jun Ushida, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A one-dimensional photonic crystal has a spatial distribution in which the refractive index periodically varies in a first direction that light is caused to be propagated and in which the refractive index is uniform in a second direction perpendicular to the first direction. An antireflective coating structure for the one-dimensional photonic crystal includes a thin-film having a refractive index and a thickness determined by a predetermined calculation method. A two or three-dimensional photonic crystal comprises two or more media that have different refractive indexes and are arranged in a two or three-dimensional pattern. An antireflective coating structure for the two or three-dimensional photonic crystal includes a thin-film comprising one of the media included in the photonic crystal. In the structure, the thin-film is disposed on an end face of the photonic crystal so as to increase the incident efficiency of light entering the photonic crystal. Thereby, the reflection of the photonic crystal is securely prevented in a simple manner.