Photonic crystal and photonic-crystal waveguide

Details Photonic crystal and photonic-crystal waveguide Photonic crystal and photonic-crystal waveguide

2005-04-12

2005-04-12

Kang, Juliana K. (Department: 2874)

Optical waveguides

Planar optical waveguide

C385S125000

Reexamination Certificate

active

06879766

ABSTRACT:
The present invention provides a technique of reducing an incident/outgoing loss of a photonic crystal. On each of incident/outgoing sides of a photonic crystal, an antireflection layer made of a photonic crystal is disposed. At the incident side of a photonic crystal200having an effective refractive index n2, a photonic crystal100having an effective refractive index n1satisfying the relation of n1<n2is disposed, and the thickness of the photonic crystal100is controlled so that reflection components from interfaces210and110cancel each other out by interference, thereby reducing a total reflection loss on the incident side. The outgoing side is similarly constructed.

REFERENCES:
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patent: 20010012149 (2001-08-01), Lin et al.
patent: 20020009277 (2002-01-01), Noda et al.
patent: 20020048422 (2002-04-01), Cotteverte et al.
patent: 20020172456 (2002-11-01), Hosomi et al.
patent: 20030039023 (2003-02-01), Romagnoli et al.
patent: 20030142719 (2003-07-01), Fan

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