Photonic crystal element
AssigneeNGK Insulators, Ltd.
InventorsJungo Kondo, Makoto Iwai, Keiichiro Asai, Tomoyoshi Tai, Kentaro Tani
Life of this patent
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Abstract
Provided is a photonic crystal element, which shows small delay of an electric signal, shows a small propagation loss, and has uniform characteristics over its entirety. The photonic crystal element includes a two-dimensional photonic crystal slab having holes periodically formed in a substrate made of a ceramics material, the photonic crystal element being configured to guide an electromagnetic wave having a frequency of 30 GHz or more and 20 THz or less.
Claims16
A photonic crystal element, comprising a two-dimensional photonic crystal slab having holes periodically formed in a substrate made of a ceramics material, the photonic crystal element being configured to guide an electromagnetic wave having a frequency of 30 GHz or more and 20 THz or less,
- wherein the ceramics material is polycrystalline or amorphous, and
- wherein the substrate has pores each having a pore size of 1 μm or more at a ratio of from 0.5 ppm to 3.000 ppm.
A photonic crystal element comprising:
- a two-dimensional photonic crystal slab having holes periodically formed in a substrate made of a ceramics material,
- a support substrate arranged below the substrate, the support substrate being configured to support the substrate;
- and
- an active element capable of at least one of transmission, reception, or amplification of the electromagnetic wave, the active element being supported by the support substrate,
- the photonic crystal element being configured to guide an electromagnetic wave having a frequency of 30 GHz or more and 20 THz or less,
- wherein the substrate has pores each having a pore size of 1 μm or more at a ratio of from 0.5 ppm to 3,000 ppm.
A photonic crystal element, comprising:
- a two-dimensional photonic crystal slab having holes periodically formed in a substrate made of a ceramics material;
- a support substrate arranged below the substrate, the support substrate being configured to support the substrate;
- a joining portion configured to integrate the substrate and the support substrate with each other;
- a cavity defined by a lower surface of the substrate, an upper surface of the support substrate, and the joining portion;
- and
- a waveguide defined in a portion in the substrate where the holes are free from being formed, the waveguide being configured to guide the electromagnetic wave having a frequency of 30 GHz or more and 20 THz or less,
- wherein the ceramics material is polycrystalline or amorphous,
- wherein the substrate has pores each having a pore size of 1 μm or more at a ratio of from 0.5 ppm to 3,000 ppm,
- wherein a period of the holes is from 10 μm to 1 mm,
- wherein the substrate has a dielectric constant of from 3.6 to 11.5 at from 100 GHz to 10 THz,
- wherein the substrate has a dielectric loss of 0.01 or less,
- wherein the substrate has a resistivity of 100 kΩ·cm or more,
- wherein the ceramics material is one selected from the group consisting of:
- quartz;
- aluminum nitride;
- aluminum oxide;
- silicon carbide;
- magnesium oxide;
- and spinel,
- wherein the photonic crystal element is usable as an antenna, a band-pass filter, a coupler, a delay line, or an isolator.
Dependencies are inferred from the claim text.