Superconducting thin film resonator

A technology of superconducting thin films and resonators, applied in resonators, waveguide devices, electrical components, etc., can solve the problems of increased effective area, poor coupling coefficient between magnetic flux focuser and RF superconducting quantum interferometer RFSQUID, etc. , to achieve uniform energy distribution, enhanced magnetic concentration effect, and simple structure

Inactive Publication Date: 2013-07-10
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a superconducting thin film resonator, to solve the problem of poor coupling coefficient between the magnetic flux focuser and the radio frequency superconducting quantum interferometer RF SQUID in the existing coplanar resonator, effectively improve the magnetic flux The magnetic concentration effect of the focuser improves the coupling between the RF SQUID gasket and the flux focuser of the RF superconducting quantum interferometer, increasing the effective area by 2.4 times

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Examples

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Embodiment 1

[0039] Embodiment 1: Design resonance frequency f 0 820MHz, unloaded quality factor Q 0 26439 superconducting thin film resonator.

[0040] The single crystal substrate 1 of this example adopts a size of 10×10×1mm 3 , the material is lanthanum aluminate LAO; the peripheral dimension of the superconducting thin film outer ring 2 is 8×8mm 2 , the four sides of the outer ring 2 constitute three step impedances, the widths of each step impedance are: 0.5mm, 0.15mm, 0.5mm, 0.85mm, and the opening width is 0.14mm; the peripheral dimension of the flux focuser 3 is 6.7× 6.7mm 2 The radius of the magnetic flux focusing hole 4 is 1mm; the inner and outer diameters of the single complementary open loop 5 are 2.25mm and 2.33mm respectively, and the opening width is 1.8mm.

Embodiment 2

[0041] Embodiment 2: Design resonance frequency f 0 954MHz, unloaded quality factor Q 0 26399 superconducting thin film resonator.

[0042] The size of the single crystal substrate 1 of this example is 10×10×1mm 3 , the material is lanthanum aluminate LAO; the peripheral dimension of the superconducting thin film outer ring 2 is 8×8mm 2 , the four sides of the outer ring 2 form three step impedances, the width of each step impedance is: 0.5mm, 0.2mm, 0.5mm, 0.8mm, and the opening width is 0.4mm; the peripheral size of the flux focuser 3 is 6.7× 6.7mm 2 The radius of the magnetic flux focusing hole 4 is 1 mm; the inner and outer diameters of the single complementary open ring 5 are 2.25 mm and 2.3 mm respectively, and the opening width is 1.84 mm.

Embodiment 3

[0043] Embodiment 3: Design resonance frequency f 0 1112MHz, no-load quality factor Q 0 25034 superconducting thin film resonator.

[0044] The size of the single crystal substrate 1 of this example is 10×10×1mm 3 , the material is lanthanum aluminate LAO; the peripheral dimension of the superconducting thin film outer ring 2 is 8×8mm 2 , the four sides of the outer ring 2 form three step impedances, the width of each step impedance is: 0.6mm, 0.25mm, 0.6mm, 0.75mm, and the opening width is 0.6mm; the peripheral size of the flux focuser 3 is 6.7× 6.7mm 2 The radius of the magnetic flux focusing hole 4 is 1mm; the inner and outer diameters of the single complementary open loop 5 are 2.25mm and 2.3mm respectively, and the opening width is 1.9mm.

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Abstract

The invention discloses a superconducting thin film resonator. The superconducting thin film resonator is mainly used for solving the problem that an existing resonator is low in sensitivity due to the fact that effective area of the existing resonator is small. The superconducting thin film resonator consists of an open superconducting thin film outer ring (2) and a superconducting thin film magnetic flux focuser (3), wherein the open superconducting thin film outer ring (2) is arranged on a single crystal substrate (1) in a plating mode, and the superconducting thin film magnetic flux focuser (3) is arranged inside the open superconducting thin film outer ring (2). Three stepped-impedances are formed by four edges of the open superconducting thin film outer ring (2). The width of each stepped-impedance is 0.15mm-0.85mm, and the three stepped-impedances are different in width. A magnetic flux focus hole (4) is formed in the middle of the superconducting thin film magnetic flux focuser (3). A single complementation open ring (5) is arranged between the magnetic focus hole and the superconducting thin film of the superconducting thin film magnetic flux focuser. The single complementation open ring (5) is used for strengthening a magnetism gathering effect of the superconducting thin film magnetic flux focuser. Due to the fact that the single complementation open ring (5) is added, the superconducting thin film resonator has the advantages of not only strengthening coupling performance between the superconducting thin film magnetic flux focuser and a gasket of a radio frequency superconducting quantum interferometer, but also increasing effective area of the superconducting thin film resonator under the condition that system complexity is not increased, improving sensitivity of a probe of a radio frequency superconducting quantum interferometer, and being capable of being used in manufacture of the radio frequency superconducting quantum interferometer.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, and in particular relates to a superconducting thin film resonator, which can be used in the manufacture of a radio frequency superconducting quantum interferometer RF SQUID. Background technique [0002] The resonators used in the existing superconducting quantum interferometer SQUID mainly include discrete component resonators, superconducting thin film coplanar resonators and dielectric resonators. in: [0003] Discrete component resonator: Use lumped parameter inductors to form a resonator to complete the signal coupling between electronic circuits and chips in the superconducting quantum interferometer SQUID system. For this kind of discrete component resonator, the resonant frequency cannot be too high, it is difficult to exceed 1GHz, and the quality factor is low, only about 200. According to the RFSQUID noise theory of radio frequency superconducting quantum interferometer, a...

Claims

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Application Information

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IPC IPC(8): H01P7/00
Inventor 雷振亚杨锐王青李磊谢拥军谢亮亮王杨婧
Owner XIDIAN UNIV
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