Home > Seminars > Collective Dynamical Circuits: Reinventing Nanoscale Electronics for Bridging the Terahertz Gap and Beyond

Collective Dynamical Circuits: Reinventing Nanoscale Electronics for Bridging the Terahertz Gap and Beyond


4/14/2014 at 2:00PM


4/14/2014 at 3:00PM


258 Fitzpatrick Hall


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Thomas Fuja

Thomas Fuja

VIEW FULL PROFILE Email: tfuja@nd.edu
Phone: 574-631-7244
Office: 275 Fitzpatrick Hall


Wireless Institute Professor
Prof. Fuja research addresses reliable communication over inherently unreliable and/or constrained communication links. He has recently focused his research on the changing role that channel codes play in the context of wireless networks, i.e., to not only provide physical-layer robustness but ...
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Within the last 20 years, nanoscale electronics has been instrumental in realizing RF and mm-wave integrated systems and today we are in the vicinity of terahertz frequencies. From a technological point of view, mm-wave and sub-mm-wave electronics holds a plethora of opportunities for imaging, sensing, medical diagnosis, and wideband communication. For example, medical tests that rely on surface moisture or substance gradient such as dental cavities or skin damage can migrate from invasive X-ray exams to low cost terahertz chips. Short range and wideband communication, non-destructive industrial testing, and the detection of concealed objects are among other applications of T-rays. Thus far, the device fmax has imposed a fundamental limit on the available power and operating frequency of solid-state sources. In this talk, I demonstrate how to exploit the theory of distributed dynamical systems to surmount the barrier of individual devices and achieve scalable terahertz radiation on a standard silicon process. First, I introduce delay-coupled oscillators, a novel architecture to efficiently generate, combine, and control the frequency of a sub-terahertz source. Next, I present an inherently scalable phased array platform based on the concept of collective dynamical circuits. Using this approach, I demonstrate the first fully integrated terahertz source that can synthesize, radiate and steer terahertz waves all from a miniature silicon die, opening the door to a new wave of applications and technologies. Finally, in connection to the presented ideas I will outline the feasibility of new computation and signal processing approaches by employing modern electronics that is tailored to the underlying device physics.

Seminar Speaker:

Yahya Tousi

Yahya Tousi

SiTune Corporation

Yahya Tousi received his B.S. and M.S. degrees from Sharif University of Technology in 2004 and 2006, respectively. In 2012 he received his Ph.D. degree from the Department of Electrical and Computer Engineering at Cornell University and he is currently a research scientist at SiTune. His research is focused on high performance solid-state terahertz circuits and integrated electromagnetics. Dr. Tousi is the recipient of the 2009 Cornell Jacob Fellowship Award, the 2011 IEEE MTT Graduate Fellowship Award, and the 2012 IEEE SSCS Pre-Doctoral Achievement Award. He is also the winner of the 2011 IMS Graduate Research Competition.