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Events for November 24, 2015
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NanoTech Seminar Series, Justin Song - Curveball electrons: Valley-based electronics and opto-electronics
Tue, Nov 24, 2015 @ 02:00 PM - 03:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Justin Song, California Institute of Technology
Talk Title: Curveball electrons: Valley-based electronics and opto-electronics
Abstract: Charge carriers in materials are often described as particles similar to free electrons but characterized by effective quantities such as an effective mass. However, electrons in topological materials defy this description; they acquire an additional quantum mechanical property - Berry curvature - that radically alters their dynamics.
I will discuss how exploiting Berry curvature in recently discovered two-dimensional heterostructures, such as graphene on hexagonal-boron-nitride (G/h-BN), grants control over the valley index - an internal quantum degree of freedom akin to spin. This strikingly manifests in low-dissipation transverse valley currents that can be decoupled from charge. I will discuss recent measurements of topological valley currents in G/hBN devices, how dissipation can be further suppressed using valley waveguides that allow valley currents to persist even in an insulating bulk. If time permits, I will also discuss how Berry curvature can alter opto-electronic properties such as a chiral flow of plasmons without magnetic field. These provide a new toolbox to engineer electronic and optoelectronic action directly into the electron wave function.
Biography: Justin Song is a Burke fellow and Sherman Fairchild scholar of physics at Caltech. He received a BSc in physics from Imperial College London (2007), an AM in physics from Harvard (2011), and a Ph.D. in applied physics at Harvard (2014).
Justin's research interests lie at the interface between engineering and solid-state physics, and include novel charge/valley/spin/energy transport, opto-electronics, topological materials, and 2D layered heterostructures. He is the recipient of the Caltech prize fellowship in physics, the APS Ovshinsky Award, and a National Science Scholarship.
Host: Han Wang
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 132
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
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Information Session in Toronto
Tue, Nov 24, 2015 @ 07:00 PM - 08:30 PM
Viterbi School of Engineering Graduate Admission
Workshops & Infosessions
Interested in graduate studies in engineering or computer science?
You are cordially invited to meet Mary Kae, Assistant Dean of Graduate and International Recruitment for the Viterbi School of Engineering, at our upcoming information session in Toronto.
Students who have earned or are in the process of earning a Bachelor's degree in engineering, math, or a hard science (such as physics, biology, or chemistry) are welcome to attend to learn more about applying to our graduate programs.
The session will include information on the following topics:
Master's & Ph.D. programs in engineering and computer science
How to Apply
Scholarships and funding
Student life at USC and in Los Angeles
There will also be sufficient time for questions. Refreshments will be provided.
Please contact us at viterbi.gradprograms@usc.edu if you have any inquiries about the event.
For more information, please visit the event pageLocation: Park Hyatt Toronto 4 Avenue Rd Toronto, ON M5R 2E8, Canada
Audiences: Everyone Is Invited
Contact: Mary Kae
