IEEE Photonics Society

Boston Photonics Society Chapter

Boston Chapter of the IEEE Photonics Society

Terahertz Systems Workshop  

Wednesday, October 12, 19, 26, November 2, 9, 2005, 7:00–9:30 PM
Located at MIT Lincoln Laboratory – 244 Wood Street, Lexington, MA, 02420, USA

November 2, 2005
7 PM

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Low-Noise Terahertz Receivers for Space Science and Terrestrial Imaging Applications Slides

Prof. K. S. Yngvesson, University of Massachusetts, Amherst, MA


Abstract:  This talk will review recent progress related to low-noise Terahertz (THz) receivers. The last decade has seen the development of Hot Electron Bolometer (HEB) receivers with superconducting (especially NbN) elements that have decreased the noise temperatures obtained above 1 THz by about an order-of-magnitude compared with earlier technology (Schottky-barrier diode mixers).  The University of Massachusetts has led the installation of a 1.2 THz to 1.5 THz HEB receiver based on the AST/RO 1.7 meter diameter telescope at the South Pole. Developments in Europe have led to THz HEB receivers that will be launched on the Herschel spacecraft in 2007. We will briefly discuss the design of such receivers, the current state-of-the-art, and the ultimate limits to their noise temperature due to quantum noise.  The above astronomical application developments have also resulted in the availability of a new low noise detector technology that can be applied in terrestrial systems. For example, UMass has demonstrated a THz focal plane array as a prototype for future arrays needed for imaging systems that can produce THz images at video rates. Early results obtained with such a system will be discussed, and other possible applications for the new technology will be identified.


Biography:  Professor Sigfrid Yngvesson received his graduate degrees in Physical Electronics (Tekn.lic., 1965, and Tekn.Dr., 1968, resp.) from the Department of Electrical Engineering at Chalmers University of Technology, Gothenburg, Sweden. He has done research in the Physics Department at the University of California, Berkeley (1964-1966, and 1968-1970) and has been teaching at the University of Massachusetts, Amherst, since 1970, where he became a full professor in 1978. Professor Yngvesson was elected a fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 1998. His field is microwave, millimeter wave and submillimeter wave (terahertz) devices and applications, especially low noise receivers with applications to astronomy and space science.  In the last fifteen years his research has primarily dealt with the development and application of hot electron bolometer heterodyne receivers for the terahertz frequency range.  He also works on microwave applications to Chemical engineering problems in catalysis. He is the author of “Microwave Semiconductor Devices”, a text and reference book (Kluwer Academic Publishers, 1991) as well as over 50 papers in refereed journals.


For more information on the technical content of the workshop, contact either:
1) Matt Emsley (, Central New England LEOS Chapter Chair
2) Farhad Hakimi (, Terahertz Systems Workshop-Technical Program Committee Chair
3) Bill Nelson (, Terahertz Systems Workshop-Technical Program Committee Co-Chair