Two-dimensional photonic crystal cavity and channel add/drop...

Details Two-dimensional photonic crystal cavity and channel add/drop... Two-dimensional photonic crystal cavity and channel add/drop...

2006-10-02

2008-11-11

Font, Frank G (Department: 2883)

Optical waveguides

Planar optical waveguide

C385S130000, C385S131000, C385S132000

Reexamination Certificate

active

07450810

ABSTRACT:
In 2D photonic crystals, cavities having a heightened Q factor are made available, wherein combining the high Q cavities with waveguides affords channel add/drop filters having high resolution. In a cavity constituted by a point defect within a 2D photonic crystal, the 2D photonic crystal is configured by an arrangement, in a two-dimensional lattice of points defined in a slab (1), of low-refractive-index substances (2) having a low refractive index relative to the slab (1) and being of identical dimension and shape. The point defect (4) contains a plurality of three or more lattice points that neighbor one another, and in these lattice points no low-refractive-index substances (2) are arranged; therein the dimension of the low-refractive-index substance (2) that should be arranged to correspond to at least one of the lattice points nearest the point defect (4) is dimensionally altered from a predetermined dimension.

REFERENCES:
patent: 2002-365599 (2002-12-01), None
Akahane, Yoshihiro et al., “Design of a channel drop filter by using a donor-type cavity with high-quality factor in a two-dimensional photonic crystal slab,” Mar. 3, 2003, Applied Physics Letter, vol. 82, No. 9, pp. 1341-1343.
Srinivasan, Kartik and Painter, Oskar, “Momentum space design of high-Q photonic crystal optical cavities,” Jul. 29, 2002, Optics Express, vol. 10, No. 15, pp. 670-684.

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