Speaker: Prof. Hossein Hashemi, University of Southern California
Advancements in semiconductor manufacturing, computer-aided design tools, and integrated circuit architectures have enabled monolithic realization of 1 – 100 GHz radiofrequency phased arrays in commercial foundry processes for automotive radars, commercial wireless communications (e.g., 5G), and other applications. Optical phased arrays enable imaging, sensing, display, holography, free space optical communications, and many other applications. For instance, a phased array lidar reduces the size, weight, and power consumption of traditional mechanically-scanning lidars while it enhances the reliability, flexibility, and functionality. Challenges associated with monolithic realization of optical phased arrays include compact realization of optical phased array components; sensitivity of the phased array to fabrication tolerances and process variations given the short wavelength of optical frequencies; inadequate models, CAD tools, and systematic design methodologies. In this talk, it is shown that a holistic approach that takes inspirations from complex radio-frequency integrated circuits can enable realization of complex optical integrated circuits with unprecedented functionalities. The talk will cover the basics, applications, and past realizations of optical phased arrays followed by our demonstrations of large-scale monolithic optical phased arrays in a commercial foundry CMOS SOI technology. The talk will also cover design of silicon photonic components that benefit large-scale realization of optical phased arrays. Ongoing challenges and research directions will also be discussed.
Hossein Hashemi is a Professor of Electrical Engineering, Ming Hsieh Faculty Fellow, and the co-director of the Ming Hsieh Institute at the University of Southern California. His research interests include analog, mixed-signal, and radio-frequency integrated circuits; photonic integrated circuits; electro-optical integrated systems; and implantable integrated solutions. He received the B.S. and M.S. degrees in Electronics Engineering from the Sharif University of Technology, Tehran, Iran, in 1997 and 1999, respectively, and the M.S. and Ph.D. degrees in Electrical Engineering from the California Institute of Technology, Pasadena, in 2001 and 2003, respectively. Hossein is an Associate Editor for the IEEE Journal of Solid state Circuits (2013 – present). He was a Distinguished Lecturer for the IEEE Solid-State Circuits Society (2013 – 2014); member of the Technical Program Committee of IEEE International Solid-State Circuits Conference (ISSCC) (2011 – 2015), IEEE Radio Frequency Integrated Circuits (RFIC) Symposium (2011 – present), and the IEEE Compound Semiconductor Integrated Circuits Symposium (CSICS) (2010 – 2014); an Associate Editor for the IEEE Transactions on Circuits and Systems—Part I: Regular Papers (2006–2007) and the IEEE Transactions on Circuits and Systems—Part II: Express Briefs (2004–2005); and Guest Editor for the IEEE Journal of Solid state Circuits (Oct 2013 & Dec 2013). Hossein was the recipient of the 2016 Nokia Bell Labs Prize, 2015 IEEE Microwave Theory and Techniques Society (MTT-S) Outstanding Young Engineer Award, 2008 Defense Advanced Research Projects Agency (DARPA) Young Faculty Award, and a National Science Foundation (NSF) CAREER Award. He received the USC Viterbi School of Engineering Junior Faculty Research Award in 2008, and was recognized as a Distinguished Scholar for the Outstanding Achievement in Advancement of Engineering by the Association of Professors and Scholars of Iranian Heritage in 2011. He was a co-recipient of the 2004 IEEE Journal of Solid-State Circuits Best Paper Award for “A Fully-Integrated 24 GHz 8-Element Phased-Array Receiver in Silicon” and the 2007 IEEE International Solid-State Circuits Conference (ISSCC) Lewis Winner Award for Outstanding Paper for “A Fully Integrated 24 GHz 4-Channel Phased-Array Transceiver in 0.13um CMOS based on a Variable Phase Ring Oscillator and PLL Architecture”. Hossein is the co-editor of the books “Millimeter-Wave Silicon Technology: 60 GHz and Beyond” published by Springer in 2008, and “mm-Wave Silicon Power Amplifiers and Transmitters” published by the Cambridge University Press in 2016.