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Add to Calendar 2/8/2018 11:00 am 2/9/2018 America/Chicago Special Condensed Matter Seminar: "Illuminating and manipulating quantum materials with femtosecond light." DESCRIPTION:

Uncovering and controlling emergent phenomena in quantum materials through external stimuli is a central goal of modern condensed matter physics. However, a major challenge lies in disentangling many different yet closely coupled interactions and fluctuating orders. Moreover, since many quantum processes in these materials are coherent only over ultrashort time scales, it is difficult to probe them using conventional static techniques. In this talk, I will demonstrate how ultrafast femtosecond optical techniques can selectively decipher and alter emergent behavior in two of the most intensely researched quantum materials in the past decade, high-Tc superconducting cuprates and topological insulators. For superconducting cuprates, ultrafast infra-red pump-probe and time-domain THz spectroscopy are used to detect collective modes and short-lived fluctuating orders. For topological insulators, time-and-angle resolved photoemission spectroscopy is used to dynamically engineer new light-induced ‘Floquet-Bloch’ electronic states. Such studies lay the foundation for utilizing coherent light-matter interaction to steer materials into a desired quantum phase.

\n\nSPEAKER:

Fahad Mahmood, John Hopkins University, Baltimore MD

190 ESB

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Special Condensed Matter Seminar: "Illuminating and manipulating quantum materials with femtosecond light."

Speaker Fahad Mahmood, John Hopkins University, Baltimore MD
Date: 2/8/2018 - 2/9/2018
Time: 11 a.m.
Location:

190 ESB

Event Contact: Marjorie Gamel
217-333-3762
mgamel@illinois.edu
Sponsor:

Department of Physics

Event Type: Seminar/Symposium
 

Uncovering and controlling emergent phenomena in quantum materials through external stimuli is a central goal of modern condensed matter physics. However, a major challenge lies in disentangling many different yet closely coupled interactions and fluctuating orders. Moreover, since many quantum processes in these materials are coherent only over ultrashort time scales, it is difficult to probe them using conventional static techniques. In this talk, I will demonstrate how ultrafast femtosecond optical techniques can selectively decipher and alter emergent behavior in two of the most intensely researched quantum materials in the past decade, high-Tc superconducting cuprates and topological insulators. For superconducting cuprates, ultrafast infra-red pump-probe and time-domain THz spectroscopy are used to detect collective modes and short-lived fluctuating orders. For topological insulators, time-and-angle resolved photoemission spectroscopy is used to dynamically engineer new light-induced ‘Floquet-Bloch’ electronic states. Such studies lay the foundation for utilizing coherent light-matter interaction to steer materials into a desired quantum phase.

To request disability-related accommodations for this event, please contact the person listed above, or the unit hosting the event.

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