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Low loss and magnetic field-tunable superconducting terahertz metamaterial.
Superconducting terahertz (THz) metamaterial (MM) made from niobium (Nb) film has been investigated using a continuous-wave THz spectroscopy. The quality factors of the resonance modes at 0.132 THzExpand
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Tuning of superconducting niobium nitride terahertz metamaterials.
Superconducting planar terahertz (THz) metamaterials (MMs), with unit cells of different sizes, are fabricated on 200 nm-thick niobium nitride (NbN) films deposited on MgO substrates. They areExpand
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Superconducting terahertz metamaterials mimicking electromagnetically induced transparency
We designed and fabricated planar terahertz (THz) metamaterials made from superconducting NbN films to mimic electromagnetically induced transparency (EIT) system. They are characterized using THzExpand
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Single photon detectors based on superconducting nanowires over large active areas
Single photon detectors based on superconducting niobium nitride (NbN) nanowires over areas of 30 μm×30 μm are fabricated using E-beam lithography (EBL) and reactive ion etching (RIE). SEM images ofExpand
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Ultra-low dark count rate and high system efficiency single-photon detectors with 50 nm-wide superconducting wires
Both system detection efficiency (DE) and dark count rate (DCR) are critical parameters of single-photon detectors for practical applications. For a superconducting nanowire single-photon detectorExpand
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Extraordinary terahertz transmission in superconducting subwavelength hole array.
We report the extraordinary terahertz (THz) transmission through subwavelength hole array in superconducting NbN film. As the temperature drops below the superconducting transition temperature, theExpand
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Detection of infrared photons with a superconductor
A superconductor single photon detector based on NbN nanowire was fabricated using electron beam lithography (EBL) and reactive ion etching (RIE) for infrared photon detection. When biased well belowExpand
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Terahertz narrow bandstop, broad bandpass filter using double-layer S-shaped metamaterials
In this study, double-layer S-shaped metamaterials (MMs) are analyzed by terahertz time-domain spectroscopy. These materials exhibit narrow bandstop and broad bandpass transmission properties at bothExpand
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Fiber-coupled superconducting nanowire single photon detector for quantum key distribution
A fiber-coupled superconducting nanowire single photon detector is presented considering practical applications. The system performances, such as dark count rate, system efficiency and noiseExpand
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