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8 October 2004 NbN hot-electron bolometer receivers and focal plane arrays for the terahertz range
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The next generation of hot electron bolometric (HEB) mixer receivers for terahertz frequencies is under development. In order to improve sensitivity and integration time, terahertz focal plane arrays with HEB elements are required. We have designed, fabricated, and tested a three-element focal plane array with HEB devices. We implemented a quasi-optical power coupling scheme using three elliptical silicon lenses. Recently developed wideband (0.5 GHz to 12 GHz) MMIC low noise amplifiers were directly integrated with HEB devices in a single block. The array was tested using an FIR laser as the LO source and a side band generator as the signal source. This is the first heterodyne array for a frequency above 1 THz, and the suitability of HEB elements in a terahertz FPA has thus been demonstrated. This development is also geared toward investigating new architectures for much larger arrays utilizing HEB elements. Additional issues to be resolved include an improved antenna design for efficient LO injection, compact and low power IF amplifiers, and cryogenic optimization.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sigfrid Yngvesson, Eyal Gerecht, Fernando Rodriguez-Morales, John Nicholson, Dazhen Gu, Richard Zannoni, Xin Zhao, Thomas Goyette, William Gorveatt, Jason Dickinson, and Jerry Waldman "NbN hot-electron bolometer receivers and focal plane arrays for the terahertz range", Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004);

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