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:
May. 30, 2006
Filed:
Aug. 30, 2004
Robert O. Miller, Rochester, MI (US);
Robert O. Miller, Rochester, MI (US);
Energy Conversion Devices, Inc., Rochester Hills, MI (US);
Abstract
A slab photonic crystal waveguide that preserves the parity of guided modes. The waveguide includes a photonic crystal layer interposed between two dielectric layers. The photonic crystal layer includes a periodic arrangement of asymmetrically shaped dielectric regions within a surrounding dielectric material. The waveguide precludes conversion of the state of parity of an introduced input mode by maintaining a symmetric mode field distribution. A symmetric mode field distribution is attained through variations in the dielectric constants of the dielectric layers that compensate for asymmetric mode localization tendencies associated with the asymmetric periodically arranged dielectric regions within the photonic crystal layer.