Photonic crystal waveguide and directional coupler using the same
First Claim
1. A photonic crystal waveguide comprising:
- a substrate;
a bottom cladding layer over said substrate; and
a core layer over said bottom cladding layer, said core layer having a uniform distribution of holes;
wherein said core layer has at least a waveguide region which is thicker than a remaining region of said core layer to cause a refractive index guide effect.
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Accused Products
Abstract
The present invention provides a photonic crystal waveguide comprising: a substrate; a bottom cladding layer over the substrate; and a core layer over the bottom cladding layer, the core layer having a uniform distribution of holes, wherein the core layer has at least a waveguide region which is thicker than a remaining region of the core layer to cause a refractive index guide effect, or wherein the core layer has at least a waveguide region, on which a dielectric pattern is provided which has a refractive index higher than a substance in contact with a top surface of the core layer, or wherein the core layer has at least a waveguide region, and the holes except on the waveguide region are filled with an air, whilst the holes on the waveguide regions are filled with a filler material having a refractive index higher than 1.
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Citations
49 Claims
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1. A photonic crystal waveguide comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a core layer over said bottom cladding layer, said core layer having a uniform distribution of holes;
wherein said core layer has at least a waveguide region which is thicker than a remaining region of said core layer to cause a refractive index guide effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 38)
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12. A photonic crystal waveguide comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a core layer with a uniform thickness over said bottom cladding layer, said core layer having a uniform distribution of holes;
wherein said core layer has at least a waveguide region, on which a dielectric pattern is provided which has a refractive index higher than a substance in contact with a top surface of said core layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 44)
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23. A photonic crystal waveguide comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a core layer with a uniform thickness over said bottom cladding layer, said core layer having a uniform distribution of holes;
wherein said core layer has at least a waveguide region, and said holes except on said waveguide region are filled with an air, whilst said holes on said waveguide regions are filled with a filler material having a refractive index higher than 1. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A directional coupler comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a photonic crystal core layer over said bottom cladding layer, said core layer having a uniform distribution of holes, and said core layer being made of such a photonic crystal material that a wavelength of a light to be propagated through said waveguide region is in the vicinity of a photonic band gap edge of said photonic crystal material in order to utilize an intense dispersion phenomenon; and
said core layer having a pair of stripe-shaped waveguide regions which extends in parallel to each other,wherein said stripe-shaped waveguide regions are thicker than a remaining region of said core layer to cause a refractive index guide effect. - View Dependent Claims (34, 35, 36, 37)
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39. A directional coupler comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a photonic crystal core layer over said bottom cladding layer, said core layer having a uniform distribution of holes, and said core layer being made of such a photonic crystal material that a wavelength of a light to be propagated through said waveguide region is in the vicinity of a photonic band gap edge of said photonic crystal material in order to utilize an intense dispersion phenomenon; and
said core layer having a pair of stripe-shaped waveguide regions which extends in parallel to each other,wherein dielectric patterns is provided on said waveguide regions, and said dielectric patterns have a refractive index higher than a substance in contact with a top surface of said core layer. - View Dependent Claims (40, 41, 42, 43)
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45. A directional coupler comprising:
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a substrate;
a bottom cladding layer over said substrate; and
a photonic crystal core layer over said bottom cladding layer, said core layer having a uniform distribution of holes, and said core layer being made of such a photonic crystal material that a wavelength of a light to be propagated through said waveguide region is in the vicinity of a photonic band gap edge of said photonic crystal material in order to utilize an intense dispersion phenomenon; and
said core layer having a pair of stripe-shaped waveguide regions which extends in parallel to each other,wherein said core layer has at least a waveguide region, and said holes except on said waveguide region are filled with an air, whilst said holes on said waveguide regions are filled with a filler material having a refractive index higher than 1. - View Dependent Claims (46, 47, 48, 49)
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Specification