Graduate Program Events

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Events During the Week of April 30th through May 7th, 2023

Monday, May 1st, 2023

PhD Final Defense
Nanoscale Enhancement of Dipole Emission: Modeling Multi-Photon Effects and Microwave Emission from Small Josephson Junctions
Time: 10:00 am - 12:00 pm
Place: 4274 Chamberlin
Speaker: Colin Whisler, Physics Graduate Student
Abstract: The classical electric dipole acts as a source of electromagnetic radiation, and the power emitted can be modified significantly by optimizing the emitter's environment. This topic has numerous applications, as the electric dipole serves as an excellent representation for processes such as fluorescence from an atomic emitter in an excited state or radiation from a Josephson junction in the AC Josephson effect. Finite difference time domain (FDTD) simulations can provide powerful tools for analyzing these phenomena in arbitrary geometries. This dissertation first calculates the enhancement of two-photon spontaneous emission (2PSE) from trivalent and divalent rare earth ions in proximity to graphene and graphene nanoribbons for achievable experimental conditions using a combination of FDTD simulations and direct computation of transition rates between energy levels in rare earths. The second portion of the dissertation considers the enhancement of dipole emission in a nanoscale gap between an atomically sharp conducting tip and a metallic surface. This serves as a model for Josephson junction spectroscopy, in which the tunneling of Cooper pairs releases local microwaves at bias-dependent frequencies that can be absorbed by nearby molecules, causing DC current to flow. Our results suggest intriguing possibilities for new applications in quantum technology while also discussing the challenges that still must be overcome.
Host: Victor Brar
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Tuesday, May 2nd, 2023

Can X-rays Trace the Origins of Printing?
Time: 2:30 pm - 3:30 pm
Place: Auditorium of Genetics/Biotech
Speaker: Minhal Gardezi, Dept of Physics
Abstract: Minhal's WN@TL presentation is being re-recorded for PBS Wisconsin's University Place! In addition to learning about her cool work, you can help fill the audience to make it look like her talk was as popular as it really was (which it was! just a few months ago).


With the advent of the Gutenberg printing press in the mid 15th century came a boom in literacy, revolutionizing the way Europeans standardized and disseminated information, and establishing the printing press as one of humanity’s most important inventions. While multiple original Gutenberg Bibles have been preserved to the present day, surprisingly little is known about the actual press itself, leaving several unanswered questions about the origins of printing.

However, Gutenberg’s press is only a fraction of the story of early human print. While the first Gutenberg Bibles were being print, thousands of miles away, Korean artisans were building upon hundreds of years of diverse printing experience. The earliest known preserved document printed on a moveable type printing press is a Korean Buddhist text called Jikji, printed in 1377, nearly 80 years before Gutenberg’s Bibles. A wealth of documents proceeding Jikji remain preserved, and their study is critical to understanding early human print.

The questions remain: How were early Eastern and Western printing presses constructed? And how, if at all, were they connected? Here we bring a physicist’s perspective to the investigation. We use synchrotron-generated X-rays to study the makeup of early printed pages from both regions, including leaves of an original Gutenberg Bible and a Korean Confucius text. Collaborating with a large team of scholars from around the globe, we seek to shed new light (literally) on the origins of print.
Host: WN@TL
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Wednesday, May 3rd, 2023

No events scheduled

Thursday, May 4th, 2023

No events scheduled

Friday, May 5th, 2023

Last class day for spring semester
Abstract: *Note: actual end time may vary.* URL:
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Deadline for Graduate students to withdraw from the Spring term
Abstract: *Note: actual end time may vary.* CONTACT: 262-3811, URL:
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Saturday, May 6th, 2023

Study day
Abstract: *Note: actual end time may vary.* URL:
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Sunday, May 7th, 2023

Final exams
Abstract: *Note: actual end time may vary.* URL:
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