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US 10,516,248 B1Granted
In-plane Josephson junction array terahertz laser
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsBenjamin J. Taylor, Teresa H. Emery
Life of this patent
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Abstract
A system includes a substrate, a high-temperature superconductor compound film disposed on the substrate, an array of superconducting regions formed within the film, a plurality of Josephson junctions formed within the film, where each Josephson junction of the plurality of Josephson junctions is formed between adjacent superconducting regions within the array of superconducting regions, and a voltage source connected to the array of superconducting regions. The plurality of Josephson junctions are separated by a distance such that they emit coherent radiation in the terahertz frequency range responsive to a voltage applied to the array of superconducting regions.
Claims20
A system comprising:
- a substrate;
- a film disposed on the substrate, the film comprising a high-temperature superconductor compound belonging to the class of compounds having a compositional form of R1−yMyBa2Cu3−zTzOx, where x is oxygen content and 6≤x≤7, wherein 0≤y≤1, where 0≤z≤1, where R comprises at least one of a rare earth and calcium, where M comprises at least one of a rare earth distinct from that of R and calcium if absent from R, where T comprises at least one of cobalt (Co), iron (Fe), nickel (Ni), and zinc (Zn);
- an array of superconducting regions formed within the film;
- a plurality of Josephson junctions formed within the film, wherein each separate Josephson junction of the plurality of Josephson junctions is formed between adjacent superconducting regions within the array of superconducting regions;
- and
- a voltage source connected to the array of superconducting regions for applying a voltage to the array of superconducting regions, wherein the plurality of Josephson junctions emit coherent radiation responsive to the voltage.
3 more elements
A system comprising:
- a substrate;
- a film disposed on the substrate, the film comprising a high-temperature superconductor compound belonging to the class of compounds having a compositional form of R1−yMyBa2Cu3−zTzOx, where x is oxygen content and 6≤x≤7, wherein 0≤y≤1, where 0≤z≤1, where R comprises at least one of a rare earth and calcium, where M comprises at least one of a rare earth distinct from that of R and calcium if absent from R, where T comprises at least one of cobalt (Co), iron (Fe), nickel (Ni), and zinc (Zn);
- an array of superconducting regions formed within the film;
- a plurality of Josephson junctions formed within the film, wherein each Josephson junction of the plurality of Josephson junctions is formed between adjacent superconducting regions within the array of superconducting regions;
- a voltage source connected to the array of superconducting regions for applying a voltage to the array of superconducting regions, wherein the plurality of Josephson junctions emit coherent radiation responsive to the voltage, wherein the voltage source is configured to be modulated to change the frequency of the coherent radiation emitted from the plurality of Josephson junctions;
- and
- circuitry, disposed adjacent to the plurality of Josephson junctions, configured to receive the coherent radiation emitted from the plurality of Josephson junctions.
4 more elements
A system comprising:
- a substrate;
- a film disposed on the substrate, the film comprising a high-temperature superconductor compound belonging to the class of compounds having a compositional form of R1−yMyBa2Cu3−zTzOx, where x is oxygen content and 6≤x≤7, wherein 0≤y≤1, where 0≤z≤1, where R comprises at least one of a rare earth and calcium, where M comprises at least one of a rare earth distinct from that of R and calcium if absent from R, where T comprises at least one of cobalt (Co), iron (Fe), nickel (Ni), and zinc (Zn);
- an array of superconducting regions formed within the film;
- a plurality of Josephson junctions formed within the film, wherein each Josephson junction of the plurality of Josephson junctions is formed between adjacent superconducting regions within the array of superconducting regions, wherein resonant conditions for coherent emission are met through matching to an external circuit such that the plurality of Josephson junctions emit coherent radiation having a wavelength between about 0.3 mm and 1 cm;
- a voltage source connected to the array of superconducting regions for applying a voltage to the array of superconducting regions, wherein the plurality of Josephson junctions emit the coherent radiation in the terahertz frequency range responsive to the voltage;
- and
- electro-optical circuitry, disposed adjacent to the plurality of Josephson junctions, configured to receive the coherent radiation emitted from the plurality of Josephson junctions.
4 more elements
Dependencies are inferred from the claim text.