Search Results - "Cao, Chunhai"
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1
Broadband Josephson parametric amplifier using lumped-element transmission line impedance matching architecture
Published in Applied physics letters (21-02-2022)“…We present a fishbone-like lumped-element artificial transmission line to overcome impedance mismatch in a reflection-type Josephson parametric amplifier…”
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2
Integrated and DC-powered superconducting microcomb
Published in Nature communications (13-05-2024)“…Frequency combs, specialized laser sources emitting multiple equidistant frequency lines, have revolutionized science and technology with unprecedented…”
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3
Superconducting terahertz metamaterials mimicking electromagnetically induced transparency
Published in Applied physics letters (17-10-2011)“…We designed and fabricated planar terahertz (THz) metamaterials made from superconducting NbN films to mimic electromagnetically induced transparency (EIT)…”
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4
Low loss and magnetic field-tunable superconducting terahertz metamaterial
Published in Optics express (02-08-2010)“…Superconducting terahertz (THz) metamaterial (MM) made from niobium (Nb) film has been investigated using a continuous-wave THz spectroscopy. The quality…”
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5
Entangled Frequency-Tunable Microwave Photons in a Superconducting Circuit
Published in Applied sciences (01-03-2023)“…We propose a frequency-tunable source to emit entangled microwave photons on the platform of a superconducting circuit, in which two superconducting…”
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6
Tuning of superconducting niobium nitride terahertz metamaterials
Published in Optics express (20-06-2011)“…Superconducting planar terahertz (THz) metamaterials (MMs), with unit cells of different sizes, are fabricated on 200 nm-thick niobium nitride (NbN) films…”
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7
Extraordinary terahertz transmission in superconducting subwavelength hole array
Published in Optics express (17-01-2011)“…We report the extraordinary terahertz (THz) transmission through subwavelength hole array in superconducting NbN film. As the temperature drops below the…”
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8
Terahertz narrow bandstop, broad bandpass filter using double-layer S-shaped metamaterials
Published in Science China. Information sciences (01-12-2013)“…Abstract In this study, double-layer S-shaped metamaterials (MMs) are analyzed by terahertz time-domain spectroscopy. These materials exhibit narrow bandstop…”
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9
Detection of infrared photons with a superconductor
Published in Science bulletin (Beijing) (01-06-2009)Get full text
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10
Design and fabrication of superconducting HEB mixer
Published in Science bulletin (Beijing) (01-06-2009)Get full text
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11
Compact superconducting transmon qubit circuits made of ultrathin NbN
Published in Applied physics letters (09-10-2023)“…We design and fabricate a compact superconducting qubit circuit made of nano-thick NbN film on a high-resistivity silicon substrate, carrying seven transmon…”
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12
Ratchet effect in triangle-shaped vertical Nb/TiOx/Nb Josephson junctions
Published in IEEE transactions on applied superconductivity (01-03-2023)“…We fabricate vertical Nb/TiO x /Nb Josephson junctions with the shape of right-angled isosceles triangles of different sizes. The TiO x layer is primarily…”
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13
Building compact superconducting microwave resonators with Hilbert space-filling curves
Published in Applied physics letters (19-12-2022)“…Superconducting quantum computing is currently one of the most promising platforms for universal quantum information processing. The readout resonator is an…”
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14
Tantalum microwave resonators with ultra-high intrinsic quality factors
Published in Applied physics letters (12-12-2022)“…We acquire tantalum thin film in its α phase (α-Ta) using direct-current magnetron sputtering. According to x-ray diffraction results, 110-Ta is dominant…”
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15
Ratchet Effect in Triangle-Shaped Vertical Nb/TiO/Nb Josephson Junctions
Published in IEEE transactions on applied superconductivity (01-03-2023)“…We fabricate vertical Nb/TiOx/Nb Josephson junctions with the shape of right-angled isosceles triangles of different sizes. The TiOx layer is primarily…”
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16
Photon-detections via probing the switching current shifts of Josephson junctions
Published in Physica. C, Superconductivity (15-08-2015)“…•We demonstrated a new photon detection scheme by probing the switching current shifts of Josephson junctions.•We studied the optical responses of both…”
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17
Tunable superconducting resonators via on-chip control of local magnetic field
Published 15-05-2024“…Chin. Phys. B 33, 058402 (2024) Superconducting microwave resonators play a pivotal role in superconducting quantum circuits. The ability to fine-tune their…”
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18
Integrated and DC-powered superconducting microcomb
Published 15-05-2024“…Nature Communications 15, 4009 (2024) Frequency combs, specialized laser sources emitting multiple equidistant frequency lines, have revolutionized science and…”
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19
High temperature superconducting narrow bandpass microwave filter
Published in ICMMT'98. 1998 International Conference on Microwave and Millimeter Wave Technology. Proceedings (Cat. No.98EX106) (1998)“…A high temperature superconducting narrow bandpass microwave filter was designed, fabricated and tested, that is a part of a receiver's front-end with high…”
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Conference Proceeding -
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Optical responses of the switching currents in Al and Nb Josephson junctions
Published 16-08-2014“…Physica C 515, 45-53 (2015) We experimentally demonstrated the optical responses of the switching currents in two types of Josephson tunnel junctions:…”
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