Two-dimensional photonic crystal cavity and channel add/drop filter
AssigneeSumitomo Electric Industries, Ltd.
InventorsSusumu Noda, Takashi Asano, Yoshihiro Akahane
Life of this patent
Estimating the term…
Abstract
The Q factor and electric field pattern (radiation pattern) for a cavity made from a donor-type point defect 4 as is illustrated in FIG. 1 were simulated by the FDTD method. The simulation parameters were configured by selecting silicon for the slab 1; and setting approximately 1.55 μm, which is generally used in optical communications, for the wavelength λ; 0.42 μm for the lattice constant a; 0.6a for the slab 1 thickness; and 0.29a for the predetermined sectional radius of the through-holes 2.
Claims11
In a two-dimensional photonic crystal configured by an arrangement, in a two-dimensional lattice of points defined in a slab, of low-refractive-index substances having a small refractive index relative to the slab and being of identical dimension and shape, a cavity made from a point defect within the two-dimensional photonic crystal, wherein:
- said point defect contains among said lattice points a plurality of three or more neighboring one another, and in said plurality of three or more lattice points said low-refractive-index substances are missing from said arrangement;
- and
- in said arrangement at least one of said low-refractive-index substances being arranged to correspond to at least one among those of said lattice points being nearest said point defect is displaced by a predetermined distance from said at least one of said lattice points nearest said point defect.
Dependencies are inferred from the claim text.