ECE Seminars

Spring 2022 Seminars:

 
Monday, March 28 at 4:25pm 
Speaker: Dr. Mona Ebrish
The Journey from Graphene to GaN Electronics and their Applications in Heterogeneous Integration
Packard 416 

 

Abstract: The ambitious expansion in computational science and engineering brought forth several new advanced technologies including the internet of things (IoT). These technologies require superb capabilities. Though Si is still the bread and butter of the semiconductor industry, it is extremely challenging for Si to meet all the new technological demands. New emerging materials like 2D materials and Wide-bandgap semiconductors offer opportunities that Si cannot. Throughout my professional career I delved into different materials to overcome this challenge. I will present some of these opportunities from the perspective of 2D-materials and WBG semiconductors. Furthermore, because of Si maturity it is important for these materials to be Si-foundry compatible. Heterogeneously integrating 2D materials and WBG semiconductors on Si-Chips is the most advantageous route to realize robust standalone chips for future technologies.

Bio: Mona Ebrish is a Fulbright Scholar who received her B.S. degree in Electrical Engineering in 2007 from the University of Tripoli, Libya. She earned her M.S. and Ph.D. in Electrical Engineering from the University of Minnesota in 2011, 2015 respectively, under the supervision of Professor Steven J. Koester. Mona’s Ph.D. dissertation is one of the earliest studies on utilizing the quantum capacitance effect in Graphene for sensing applications. Later she spent 4 years at IBM as an Advisory Research Scientist working on Si-CMOS scaling challenges. Currently she is a Postdoctoral fellow at the Naval Research Lab investigating wide-bandgap semiconductors for high-voltage applications. Her research resulted in more than a dozen patents and over 30 papers and abstracts in major journals and conferences.

 

 
Wednesday, March 30 at 4:25pm 
Speaker: Dr. Doug Baney
Career Experiences in Microwaves, Lasers and Mice!
Packard 416 

 

Abstract: Doug will discuss what inspired him into the field of microwaves and optics and give some lessons learned in industrial R&D at Hewlett-Packard, Agilent Technologies, and Keysight Technologies. He’ll provide fiber laser development and application examples including the story of the invention of the laser mouse.

Bio: Doug Baney has over 30 years of experience in engineering, applied research, and marketing with HP, Agilent, and Keysight Technologies in Silicon Valley. This led to many new and novel products in the fields of millimeter waves and photonics including the development of the first globally commercialized laser mouse. He holds 246 US and international patents, 83 publications cited over 2,300 times, and served as General Co-Chair of the Optical Fiber Communications Conference and General Co-Chair of the Optical Amplifiers and Their Applications Conference. In his current role as Corporate Director of Education, he manages engagements with universities worldwide with dotted line connections to marketing, research, human resources, and sales. He’s an Honorary Visiting Professor with The University of Edinburgh, an Adjunct Professor with the University of California, Santa Barbara, and a Fellow of the IEEE.

 

 
Monday, April 4 at 4:25pm 
Speaker: Dr. Lianfeng Zhao
Metal Halide Perovskites: Toward CMOS-Compatible Light Emitters
Packard 466 

 

Abstract: Metal halide perovskite semiconductors are a proposed new generation of light emitting devices featuring high color quality, energy efficiency and low manufacturing cost. For example, perovskite LEDs with external quantum efficiencies above 20% have been realized. Despite rapid advances in performance of devices in the laboratory, better understanding of their fundamental properties is crucial for their optimization and commercial realization.

In this seminar, I will describe research in our group on fundamental properties of metal halide perovskite semiconductors, and on how that understanding can be deployed to immediately benefit device performance. First, I will discuss principles for perovskite semiconductors to be used as efficient light emitters, and will suggest a strategy to achieve stable bandgap tunability for wavelength-tunable LEDs and lasers. Next, I will present our work on improving the mechanical stability of perovskite semiconductors through molecular engineering for flexible applications, and on thermal management strategies for high-power applications. Third, I will describe our advances in using perovskite light emitters for high-speed applications and will discuss the path forward for developing CMOS-compatible light sources (e.g., thin film laser diodes). Finally, I will describe our findings on intrinsic chemical properties of metal halide perovskite semiconductors (e.g., redox and photoelectrochemical properties); this understanding is important for the development of stable perovskite devices for practical use.

Bio: Lianfeng Zhao is currently a Postdoctoral Research Associate at Princeton University. He received his Ph.D. from Princeton University in 2019, M.S. from Tsinghua University in 2014, and B.E. from Xidian University in 2012. His research focuses on optoelectronic thin-film materials, devices, and applications. His work has been recognized by a number of awards including the Princeton Wallace Memorial Honorific Fellowship and the Princeton School of Engineering and Applied Science Award for Excellence.