SUNMONTUEWEDTHUFRISAT
Events for March 24, 2023
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ECE-EP seminar - David Burghoff, Friday, March 24th at 10am in EEB 132
Fri, Mar 24, 2023 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: David Burghoff, Notre Dame
Talk Title: Broadband quantum and nonlinear photonics at long wavelengths
Series: ECE-EP Seminar
Abstract: While the longwave infrared and terahertz ranges have potential to revolutionize disease detection and environmental monitoring, there is currently a lack of compact broadband sources and integrated photonics platforms. I will discuss some of the work of my group that seeks to address this grand challenge. First, I will discuss our development of quantum cascade laser-based frequency combs, light sources that fill the gap between broadband incoherent sources and lasers. I will showcase how we created the first combs in the terahertz range and how our experimental investigations of these combs led to our discovery of a new fundamental comb state that manifests in any laser at any wavelength. Next, I will delve into our development of ultra-low-loss platforms for long wavelengths based on hybrid photonic integration, which allowed us to create optical resonators in the longwave infrared with quality factors two orders of magnitude better than the state-of-the-art. Finally, I will discuss our creation of ptychoscopy, a new sensing modality that allows for ultra-precise measurements of optical spectra. This measurement enables the measurement of remote signals with quantum-limited frequency resolution over the entire bandwidth of a comb, for the first time allowing incoherent spectra to be characterized with the precision techniques of combs.
Biography: David Burghoff is an Assistant Professor at Notre Dame, where his lab blends photonics with quantum devices to develop novel sensing and computing modalities. Prior to this, he was a postdoctoral fellow and research scientist at the Massachusetts Institute of Technology, where he led a team working in DARPA's SCOUT program. He also received his Ph.D. from MIT, where he won the J.A. Kong Award for MIT's Outstanding Electrical Engineering Thesis. He co-chaired the 2022 and 2020 International Quantum Cascade Laser School and Workshop, and he was one of only five faculty nationally named as a 2022 Moore Inventor's Fellow. His other awards include the ONR Young Investigator Program Award, the NSF CAREER Award, the AFOSR Young Investigator Program Award, and the Intelligence Community Postdoctoral Fellowship.
Host: ECE-Electrophysics
More Information: David Burghoff Seminar Announcement.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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Photonics Seminar - Stefan Badescu, Friday, March 24th at 10:30am in EEB 248
Fri, Mar 24, 2023 @ 10:30 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Stefan Badescu, Sensors Directorate, AFRL
Talk Title: The role of gain-loss distribution in topological laser arrays
Series: Photonics Seminar Series
Abstract: Motivated by earlier demonstrations of III-V topological lasers, I will present insights from modeling of ring arrays with engineered distributions of gain and loss. In addition, I will discuss the influence of Corbino geometrical parameters on the bulk density of states and on the properties of topological states, including the interplay between disorder, quality factors, and gain contrast. In the second part I will present progress with fabrication of device structures as part of a collaboration between Air Force Research Laboratory and the Ohio State University.
Biography: Stefan C. Badescu received his PhD in theoretical condensed matter physics in 2002 from Brown University, with work in quantum diffusion and in computational material science. From 2002 he was a National Research Council fellow at Naval Research Laboratory, with work in quantum computing. From 2005 he was a research faculty with University of Maryland at College Park with work on spin qubits and on carbon materials. He joined the Air Force in 2011 with computational work on wide bandgap materials for electronics and on III-V semiconductors. More recently he led a Topological Photonics subproject on 'Topologically Enabled Devices'.
Host: Mercedeh Khajavikhan, Michelle Povinelli, Constantine Sideris; Hossein Hashemi; Wade Hsu; Mengjie Yu; Wei Wu; Tony Levi; Alan E. Willner; Andrea Martin Armani
More Information: Stefan Badescu Flyer.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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ECE-S Seminar Announcement: Dr. Christian Cuba Samaniego
Fri, Mar 24, 2023 @ 01:00 PM - 02:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Christian Cuba Samaniego, Research Fellow, Department of Immunology, Harvard Medical School
Talk Title: Adapting feedback control and pattern recognition paradigms for biotechnological applications
Abstract: Engineering synthetic genetic networks with desired behavior for robust adaptation or complex decision-making is challenging. Current approaches rely on different negative regulation techniques or logic-based operators, which suffer from suboptimal performance. To address this limitation, we introduce two design principles: (1) ultrasensitive input-output behavior and (2) tunable thresholds. Here, we engineer ultrasensitive-based networks to both achieve adaptive behavior through feedback control and build synthetic genetic programs for molecular pattern recognition by implementing neural computing networks in living cells.
Biography: Christian Cuba Samaniego received his BS degree in Mechatronic Engineering from "Universidad Nacional de Ingenieria" in Lima-Peru in 2009. He obtained his PhD in Mechanical Engineering from University of California Riverside in 2017 under the supervision of Prof. Elisa Franco. He joined the Biological Engineering Department at Massachusetts Institute of Technology as a postdoc under the supervision of Prof. Ron Weiss (2019), and Mechanical and Aerospace Engineering Department in the lab of Prof. Elisa Franco (2022). Currently, Christian is a research fellow in the Department of Immunology at Harvard Medical School in the lab of Prof. Ming-Ru Wu. His current research is at the interface of Control Theory, Systems and Synthetic Biology, and Machine Learning. I am specially interested in the design, analysis and applications of biomolecular feedback control systems and molecular neural networks for decision-making (molecular pattern recognition) in living cells.
Host: Dr. Urbashi Mitra (ubli@usc.edu)
Webcast: https://usc.zoom.us/j/93768871353?pwd=c0haOXhxREVBY05VbUs0cDh4YTMzdz09More Information: ECE Seminar Announcement-Cuba-Samaniego-032423.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
WebCast Link: https://usc.zoom.us/j/93768871353?pwd=c0haOXhxREVBY05VbUs0cDh4YTMzdz09
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
