Welcome! We are the High Speed Integrated Circuits Group, a research group with the University of Illinois at Urbana-Champaign. We design and build cutting edge devices and circuits for the next generation of high-frequency applications.
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Congratulations to Dr. Donald Cheng for winning Best Student Paper at CSMANTECH 2011 for his paper titled, “Type-II DHBTs Microwave Characterization and Metallization Issues”. This paper described the problem of emitter-to-base shorts during the fabrication of Type-II submicron DHBTs. He presented designs of experiment to identify the problem, as well as the solution to the problem. Ultimately, the BE shorts were minimized, and devices were fabricated with room temperature current gain cutoff frequency (fT) up to 680 GHz.
Find the award announcement here: http://www.csmantech.org/Conference%20Information/paperawards.html
Find the award-winning article here: Type-II DHBTs Microwave Characterization and Metallization Issues
Best of luck to our friend Donald at Infinera Corporation.
Two great new articles on the transistor laser were published this month!
From Compound Semiconductor: “The Transistor Laser: A Radical, Revolutionary Device”
and from Optics and Photonics News: “The Metamorphosis of a Transistor into a Laser”
Professor Feng gave an invited lecture on the transistor laser at the Hong Kong University of Science and Technology’s Institute for Advanced Study. He covers the history of its invention, the basic physics of operation, current research results, and future expectations for the novel device.
See the webcast here: Video
 Milton receives a plaque commemorating the creation of the Milton Feng Endowed Scholarhship At Professor Feng’s 60th birthday party on July 16th, 2010, Richard Chan unveiled the Milton Feng Endowed Scholarship. The scholarship was formed through contributions by friends, colleagues, and former students. It was a fitting end to an evening of symposium-style talks, dinner, drinks, and general merrymaking.
Please contact Eric Iverson to inquire about pictures of the event.
After discovering a flaw in the 160-year-old circuit theory, Han Wui Then’s Transistor Laser research has revised Kirchoff’s current law to account for optical generation/recombination. His research enables a simple and intuitive way to view the relationship between electrons and photons in direct semiconductors.
“Transistor-laser breaks Kirchhoff’s Law, rewrites textbooks”: EE Times
“Transistor laser rewrites the rules”: Optics.org
“Redefining Electrical Current Law With the Transistor Laser”: Science Daily
H. Then, M. Feng, and N. Holonyak Jr, “Physics of base charge dynamics in the three port transistor laser,” Applied Physics Letters, vol. 96, p. 113509, 2010.
H. Then, M. Feng, and N. Holonyak Jr, “Microwave circuit model of the three-port transistor laser,” Journal of Applied Physics, vol. 107, p. 094509, 2010.
In addition to ECE 447 (Active Microwave Circuit Design), Professor Feng will be joint-teaching a course with Professor K.Y. Cheng. This new course will focus on the physical operation and Green Energy applications of LEDs and Solar Cells.
This will be a great opportunity to learn about these two important devices, from two men that worked with some of the most influential inventors in the field of optoelectronic devices.
Course webpage coming soon for ECE 498MF (Semiconductor LEDs and Solar Cells). For now, information can be found on the ECE department summary for the course
“Scientists break high speed light modulation record — Twice” : Science Daily
“Han Wui Thenworks to create faster, cheaper network technology”: Illinois ECE Headline News
Publication download link: Applied Physics Letters
“4.3 GHz optical bandwidth light emitting transistor”
G. Walter, C. H. Wu, H. W. Then, M. Feng, and N. Holonyak, Jr., Appl. Phys. Lett. 94, 241101 (2009)
World’s fastest transistor operates at blinding speed: New Scientist
World’s fastest transistor approaches goal of terahertz device: ECE News Bureau
 Illinois research team fabricates transistor laser: compoundsemiconductor.net
UI building a better transistor: News-Gazette November 2004
New transistor laser could lead to faster signal processing: UIUC News Bureau November 2004
America Institute of Physics selected “Room Temperature CW Operation of Transistor Laser” as top 5 paper published in the 43 years history of Applied Physics Letter in 2006
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