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DTSTART;TZID=America/New_York:20250825T110000
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DTSTAMP:20260815T161542
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LAST-MODIFIED:20250818T180224Z
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SUMMARY:Photonics Initiative Seminar: Sergio Carbajo
DESCRIPTION:Dr. Sergio Carbajo\, UCLA\nQuantum Filmmaking: Capturing and Controlling Ultrafast Dynamics from Atoms to Applications\nAbstract – The ability to visualize and control quantum systems in action—spanning attosecond electron dynamics to functional protein motions—holds transformative potential for science and technology. Over the past decade\, advances in ultrafast photon and electron sources\, such as optical frequency combs\, X-ray free-electron lasers (XFELs)\, and compact quantum light sources\, have enabled unprecedented spatiotemporal resolution of quantum processes. These tools now allow us to “film” phenomena like photosynthetic water oxidation\, light-triggered protein conformational changes\, and quantum dot-based photon emission\, bridging gaps between fundamental physics and applications in energy\, medicine\, and computing. \nIn this talk\, I will present our recent breakthroughs in attosecond and femtosecond imaging\, including novel QED-based light-matter interactions and compact accelerator technologies that democratize access to ultrafast science. I will further outline a vision for the next decade: leveraging these tools to engineer functional quantum systems\, from scalable photonic quantum computing with high-fidelity cluster states to dynamic protein mapping for personalized medicine. By integrating interdisciplinary approaches—spanning quantum electrodynamics\, molecular biophysics\, and computational algorithms—our work aims to translate atomic-scale insights into solutions for societal challenges. This research not only expands the frontiers of attosecond science but also redefines its role in addressing global needs. \nBio – Carbajo is an assistant professor at the UCLA Electrical & Computer Engineering (ECE) and the UCLA Physics & Astronomy departments and a visiting professor at Stanford University’s Photon Science Division at SLAC National Accelerator Laboratory. He is the founder and director of the Quantum Light-Matter Cooperative\, a scientific consortium whose mission is to understand\, design\, and ultimately control light-driven physical processes to help solve interconnected socio-technological challenges. \nHe graduated with a BS in Telecom Engineering from Tecnun\, Universidad de Navarra in 2009. In 2012\, he received his M.Sc. in Electrical and Computer Engineering from Colorado State University’s National Science Foundation Engineering Research Center. Later he continued his joint doctoral program simultaneously at the Research Laboratory of Electronics\, Massachusetts Institute of Technology and the Center for Free Electron Laser Science\, Deutsches Elektronen Synchrotron\, and obtained his Ph.D. in Physics in 2015. He has received several awards recognizing his contributions to ultrafast photon sciences and their application in life and energy sciences\, including the 2024 Nature LSA Rising Star Award\, the 2024 Humboldt Fellow Award\, the 2024 ONR Young Investigator Program award\, the 2023 AFOSR Young Investigator Program award\, the 2021 Horizon Prize from the Royal Society of Chemistry\, the 2021 SPIE Early Career Award\, the Japan Society for the Promotion of Science Fellowship in 2019\, SRI 2018 Young Scientist Award\, and the PIER Helmholtz Foundation Dissertation Award in 2015\, among others. He teaches photonics\, ultrafast and quantum optics\, and accelerator physics at UCLA and at the U.S. Particle Accelerator School. He currently holds various patents\, is the author of over 100 peer-reviewed publications – including two book chapters – and has presented his work at over 60 international conferences. \n2025 08 25 Sergio Carbajo Photonics Seminar flier \nZoom Meeting ID: 835 3199 9957   Passcode: 664696
URL:https://asrc.gc.cuny.edu/event/photonics-initiative-seminar-sergio-carbajo/
LOCATION:ASRC Auditorium\, 85 St. Nicholas Terrace\, New York\, NY\, 10031\, United States
CATEGORIES:Photonics
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DTSTART;TZID=America/New_York:20250828T110000
DTEND;TZID=America/New_York:20250828T120000
DTSTAMP:20260815T161542
CREATED:20250728T141710Z
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SUMMARY:Photonics Initiative Seminar:  Yohannes Abate
DESCRIPTION:Dr. Yohannes Abate\, The University of Georgia \nThere’s Plenty of Interaction at the Bottom\nAbstract – The formulation of quantum mechanics in the late 1920s forever changed physics. More recently\, quantum materials have emerged\, presenting fascinating opportunities in condensed matter physics. Elementary interactions among elements such as photons\, electrons\, phonons\, and other quasiparticles in quantum materials give rise to the emergence of intriguing phases and offer enormous opportunities for the development of quantum technologies. However\, investigating these interactions at the relevant length scale requires high-resolution methods beyond traditional far-field optical imaging and spectroscopy techniques\, which are constrained by the diffraction limit of light. Interestingly\, during the same period in the late 1920s\, a visionary scientist named Synge introduced a groundbreaking concept that could circumvent the diffraction limit. Synge shared his idea with Einstein\, who encouraged him to publish it. After years of pioneering work by various groups\, a powerful modern nano-optical technique\, a variant of Synge’s original idea has emerged that enables high-resolution exploration of plenty of nanoscale interactions\, some of which I will highlight in this talk. I will present examples from two classes of quantum materials\, correlated oxides and van der Waals (vdW) crystals\, that we studied across the visible to terahertz spectrum. Correlated oxides offer exciting opportunities to reconfigure nano-optoelectronic phenomena\, owing to their highly tunable local optical and electronic properties. Our recent results reveal how external perturbations\, such as applied strain\, fields\, or thermal input\, alter dopant distribution at the nanoscale in correlated oxides\, leading to ordered\, reconfigurable phases. This reconfigurability enables the design of robust artificial synapses and opens new frontiers for fundamental understanding of memory\, learning\, and information retention for brain-inspired information processing. In-plane vdW heterostructures composed of atomically thin monolayers with lateral interfaces\, distinct from vertical heterostructures\, can lead to intriguing physical phenomena arising from various interactions\, including intralayer coupling\, lateral strain\, interface defects\, spin-orbit interaction\, correlated electronic fluctuations\, and 2D alloys at interfaces. I will present recent results that provide quantitative insights into the role of these interactions in altering the complex dielectric function of 2D materials at the nanoscale. \nBio – Dr. Yohannes Abate is the Susan Dasher and Charles Dasher MD Professor of Physics at the University of Georgia and Founding Director of the Quantum Science & Engineering Program (https://quantum.uga.edu/). Abate’s condensed matter physics research interests include investigation of nanoscale and quantum phenomena and interactions in two-dimensional materials\, oxide materials\, and quantum emitters. Particularly his group is fascinated by how non-equilibrium or collective quantum phenomena that occur at the atomic/molecular scale result in nanoscale emergent behavior in quantum materials. His group implements various terahertz\, infrared\, optical spectroscopy and scanning probe techniques with diffraction unlimited spatial resolution. \nProfessor Abate joined the University of Georgia (UGA) as an associate professor of physics in August 2017. He received his PhD in Physics at the University of Iowa in 2006. From 2006-2009 he was a postdoctoral research fellow at the University of California\, Berkeley and Lawrence Berkeley National Laboratory. In September of 2009 he has spent time as a Visiting Scientist at the Nano-Photonics Laboratory\, Max-Planck-Institut für Biochemie\, Martinsried\, Germany. He has received the NSF Career Award (2016) and in 2023 he has been selected by the Gordon and Betty Moore Foundation as one of its 2023 Experimental Physics Investigators. He received the BS degree in physics from Addis Ababa University\, Ethiopia. He is a member of the American Physical Society and Materials Research Society. \n2025 08 28 Yohannes Abate Photonics Seminar flier \nZoom Meeting ID: 873 8977 0653   Passcode: 133893
URL:https://asrc.gc.cuny.edu/event/photonics-initiative-seminar-yohannes-abate/
LOCATION:ASRC Auditorium\, 85 St. Nicholas Terrace\, New York\, NY\, 10031\, United States
CATEGORIES:Photonics
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