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In this paper, we present the development of a graphene-based hot electron bolometer with Johnson noise readout. The bolometer is a graphene microbridge connected to a log spiral antenna by Au contact pads. The Fourier transform spectrometer measurement shows the bolometer has high coupling efficiency in the frequency range from 0.3 to 1.6 THz. Using 300/77 K blackbody loads, we measure an optical...
In this letter, we report GaN planar Schottky barrier diodes (SBDs) with the DC and RF performance. The air-bridge structure is adopted to reduce the parasitic parameters. The cut-off frequency (ƒc) of the diode with an anode diameter of 5 µm is calculated to be 655 GHz at zero bias. By using four anodes series GaN SBDs chip, a frequency tripler with a peak output power of 2.1 mW at 103.5 GHz is demonstrated...
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