Optical modulation element and optical modulation device having the same
AssigneeCanon Kabushiki Kaisha
InventorHikaru Hoshi
Life of this patent
Estimating the term…
Abstract
An optical modulation element includes a waveguide defined based on a defect in a photonic crystal, a carrier conducting region for conducting a carrier to the waveguide, an electrode for injecting a carrier into the carrier conducting region, and a current control unit for controlling the quantity of carrier to be conducted to the waveguide, wherein the photonic crystal and the electrode are made of a material containing TiO2 as a main composition, and wherein the current control unit functions to change the refractive index of a medium constituting the waveguide in accordance with the quantity of carrier conducted to the waveguide, thereby to modulate the light propagated through the waveguide.
Claims10
An optical modulation element, comprising:
- a waveguide defined based on a defect in a photonic crystal;
- a carrier conducting region configured to conduct a carrier to said waveguide;
- an electrode configured to inject a carrier into said carrier conducting region;
- and
- a current control unit configured to control a quantity of carrier to be conducted to said waveguide;
- wherein said photonic crystal and said electrode are made of a material containing TiO2 as a main composition, and
- wherein said current control unit is configured to change a refractive index of a medium constituting said waveguide in accordance with the quantity of carrier conducted to said waveguide, thereby to modulate light propagated through said waveguide.
An optical modulation element, comprising:
- a waveguide defined based on a defect in a photonic crystal;
- a resonator defined based on a defect in a photonic crystal;
- a carrier conducting region configured to conduct a carrier to said resonator;
- an electrode configured to inject a carrier into said carrier conducting region;
- and
- a current control unit configured to control a quantity of carrier to be conducted to said resonator;
- wherein said photonic crystal and said electrode are made of a material containing TiO2 as a main composition, and
- wherein said current control unit is configured to change a refractive index of a medium constituting said resonator in accordance with the quantity of carrier conducted to said waveguide, thereby to change a resonance mode frequency of said resonator to control waveguiding from said waveguide to said resonator.
An optical modulation element, comprising:
- a waveguide defined based on a defect in a photonic crystal;
- a refractive-index modulating region provided around said waveguide;
- a carrier conducting region configured to conduct a carrier to said refractive-index modulating region;
- an electrode configured to inject a carrier into said carrier conducting region;
- and
- a current control unit configured to control a quantity of carrier to be conducted to said refractive-index modulating region;
- wherein said photonic crystal and said electrode are made of a material containing TiO2 as a main composition, and
- wherein said current control unit is configured to change a refractive index of a medium constituting said refractive-index modulating region in accordance with the quantity of carrier conducted to said refractive-index modulating region, thereby to modulate light propagated through said waveguide.
Dependencies are inferred from the claim text.