USA As Represented by Secretary of the Navy

Other

The Navy

Teresa H Emery

Benjamin J Taylor

Anna Leese De Escobar

Susan Anne Elizabeth Berggren

Ardeshir Ratan Bulsara

Salvatore Baglio

Bruno Ando

Angela Beninato

An antenna comprising; a substrate; a continuous film of yttrium barium copper oxide (YBCO) disposed on the substrate having first and second regions, wherein the first region has a first oxygen doping level and wherein the second region has a second oxygen doping level that is different from the first oxygen doping level; a nano-scale conductive structure, shaped to resonate at a terahertz (THz) frequency, disposed on a boundary between the first and second regions; and a conductive path electrically connected to the first and second regions and to the conductive structure such that induced current in the structure due to incoming THz radiation heats the boundary thereby creating a thermal gradient, which results in the generation of Seebeck effect voltage.

High-temperature superconducting seebeck nano-scale THz antenna

A method includes providing a film of a high-temperature superconductor compound on a flexible substrate, where a portion of the film has a first oxygen state, and exposing a portion of the film to a focused ion beam to create a structure within the film. The structure may result from the portion of the film being partially or completely removed. The structure may be a trench along the length or width of the film. The method may include annealing the exposed portion of the film to a second oxygen state. The oxygen content of the second oxygen state may be greater or less than the oxygen content of the first oxygen state.

Method for creating high-resolution micro- to nano-scale structures on flexible substrates

A system includes a substrate having a high-temperature superconductor compound film disposed thereon. A first superconducting region is formed within the film and has a first stabilized oxygen content. A second superconducting region is also formed within the film and is located adjacent to the first superconducting region. The second superconducting region has a second stabilized oxygen content. A boundary region is formed within the film and separates the first superconducting region from the second superconducting region. A voltage source is connected to the first superconducting region and the second superconducting region. The boundary region emits electromagnetic radiation responsive to an applied voltage from the voltage source to one of the first superconducting region and the second superconducting region. A current flows from the first superconducting region to the second superconducting region, or vice versa, responsive to the applied voltage.

High-temperature superconductor teraherz emitting diode

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.

In-plane Josephson junction array terahertz laser

A method includes providing a film of a high-temperature superconductor compound on a substrate, where a portion of the film has a first oxygen state, and exposing a portion of the film to a focused ion beam to create a structure within the film. The structure may result from the portion of the film being partially or completely removed. The structure may be a trench along the length or width of the film. The method may include annealing the exposed portion of the film to a second oxygen state. The oxygen content of the second oxygen state may be greater or less than the oxygen content of the first oxygen state.

Method for creating high-resolution micro- to nano-scale structures in high-temperature superconductor films

A Josephson junction device and methods for manufacture can include an untwinned YBaCuOnanowire having crystallographic a- and b-axes. The nanowire can be established from YBaCuOfilm (6.0&#x2264;x&#x2264;7.0) using a photolithography process, followed by an ion milling process, to yield the YBaCuOnanowire. The crystallographic b-axis of the nanowire can be parallel to the long dimension of the nanowire. First and second gate structures can be placed on opposite sides of the nanowire across from each other, to establish first and second microgaps. A gate voltage can be selectively applied across the first and said second gate structures, which can further establish a selective electric field across the first and second microgaps. The electric field can be parallel to the nanowire crystallographic a-axis, to selectively cause an at will Josephson junction effect.

Nanowire-based superconducting electrostrictive device

A sensor for detecting both magnetic fields and electric fields can include at least one Sawyer-Tower (ST) circuit that can incorporate a multiferroic capacitor. An odd number of ST circuits coupled together in a ring configuration, so that for each ST circuit, the output of one ST circuit is an input to another of the ST circuits. The multiferroic capacitors can include a multiferroic layer that can be deposed on a substrate. For each multiferroic capacitor, the deposition process can cause an inherent amount of impurities in the multiferroic layer. The number of said odd number of ST circuits to be coupled together is chosen according to the amount of impurities, to 'forgive' the impurities. The higher the level of impurities in the multiferroic layers, that more ST circuits that are required in the ring to achieve the same sensor sensitivity. BDFO can be chosen for the multiferroic material.

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San Diego, CA, United States of America

Teresa H Emery