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12 November 1999 Low-noise HEB heterodyne receivers and focal plane arrays for the THz regime using NbN
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We have developed prototype HEB receivers using thin film superconducting NbN devices deposited on silicon substrates. The devices are quasi-optically coupled through a silicon lens and a self-complementary log-specific toothed antenna. We measured DSB receiver noise temperatures of 500 K (13 X hf/2k) at 1.56 THz and 1,100 K (20 X hf/2k) at 2.24 THz. Noise temperatures are expected to fall further as devices and quasi-optical coupling methods are being optimized. The measured 3 dB IF conversion gain bandwidth for one device was 3 GHz, and it is estimated that the bandwidth over which the receiver noise temperature is within 3 dB of its minimum value is 6.5 GHz which is sufficient for a number of practical applications. We will discuss our latest results and give a detailed description of our prototype setup and experiments. We will also discuss our plans for developing focal plane arrays with tens of Hot Electron Bolometric mixer elements on a single silicon substrate which will make real time imaging systems in the THz region feasible.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. Sigfrid Yngvesson, Eyal Gerecht, Charles F. Musante, Yan Zhuang, Ming Ji, Thomas M. Goyette, Jason C. Dickinson, Jerry Waldman, Pavel A. Yagoubov, Gregory N. Gol'tsman, Boris M. Voronov, and Eugeni M. Gershenzon "Low-noise HEB heterodyne receivers and focal plane arrays for the THz regime using NbN", Proc. SPIE 3795, Terahertz and Gigahertz Photonics, (12 November 1999);

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