Private: “Terahertz: The Last Untapped Spectrum”
Dr. Ehsan Afshari
When: Monday, October 21, 2013 at 3:05 p.m.
Where: Warnock 1250
There is an increasing interest in low cost THz systems for medical imaging, spectroscopy, and high data rate communication. Recent results in the lower THz frequencies (<600 GHz) suggests that a standard CMOS process can compete with compound semiconductors for some applications. In this talk, after a brief introduction to our research group at Cornell, we present a few “real” applications for the CMOS THz systems as well as a few “fake” ones. Next, we discuss major challenges in realizing these systems in CMOS. Moreover, we show several novel methods to overcome these challenges to generate mW-level powers at 300-500 GHz with relatively low noise using oscillators, amplifiers, and frequency multipliers.
Ehsan Afshari received the B.Sc. degree in Electronics Engineering from the Sharif University of Technology, Tehran, Iran and the M.S. and Ph.D. degree in electrical engineering from the California Institute of Technology, Pasadena, in 2003, and 2006, respectively. In August 2006, he joined the faculty in Electrical and Computer Engineering at Cornell University.
He was awarded National Science Foundation CAREER award in 2010, Cornell College of Engineering Michael Tien excellence in teaching award in 2010, Defense Advanced Research Projects Agency (DARPA) Young Faculty Award in 2008, and Iran’s Best Engineering Student award by the President of Iran in 2001. He is also the recipient of the best paper award in the Custom Integrated Circuits Conference (CICC), September 2003, and the first place at Stanford-Berkeley-Caltech Inventors Challenge, March 2005.