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Some of terahertz detectors such as high temperature superconducting (HTS) YBa2Cu2Ox (YBCO) Josephson junction mixer are suffering from impedance mismatching problem with antenna where the junction impedance barely reaches several ohms. This paper presents two impedance matching methods based on impedance-wideband bow-tie antennas. First, a quarter of wavelength impedance matching network is proposed...
This paper presents a terahertz (THz) spectrometer based on high temperature superconducting Josephson junction. The YBa2Cu3O7 (YBCO) bi-crystal Josephson junctions (JJS) with log-periodic antennas are used as detectors. In the low temperature, with the signal measurement, data acquisition and human-computer interactive system, the automatic measurement system of THz spectrometer is finally accomplished...
The heart of the integrated antenna and detector is the matching network between them. In this paper, four type antennas for matching the small impedances of high temperature superconducting terahertz detectors at 650GHz are proposed. And the coupling efficiency has improved for high temperature superconducting YBa2Cu2Ox (YBCO) Josephson junction detector with these antennas. Meanwhile, the array...
Varying-density hole-array-embedded trapezoidal SPP waveguides are designed to halve the resonant spectral width and to reduce the EBL machine time by 20 fold. Experimental observations are shown.
Metal-Bragg-grating-embedded trapezoidal SPP waveguides are fabricated using a novel enclosure method. We will show theoretical and experimental data demonstrating a device having 1100 nm/RIU detection sensitivity.
ITO supports surface plasmon polaritons above 2.28 μm wavelength in symmetric glass-ITO-glass waveguides. Here, we report the dispersion relationship and experimental findings.
ITO supports surface plasmon polaritons above 2.28 μm wavelength in symmetric glass-ITO-glass waveguides. Here, we report the dispersion relationship and experimental findings.
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