Research Seminars @ Illinois

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Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

Physics Colloquium: "Non-reciprocal and robust photonics through traveling wave interactions"

Event Type: Seminar/Symposium
Sponsor: Department of Physics
Location: Loomis Lab 141 and via Zoom
Virtual
Date: Sep 11, 2024 4:00 pm
Speaker: Gaurav Bahl (UIUC)
Contact: Kelly Darr
E-Mail: khdarr@illinois.edu
Phone: 217-300-7821
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Originating Calendar: Physics - Colloquium; Time-reversal symmetry is a defining property for photons and phonons propagating in linear stationary media. While such linearity is advantageous from a design perspective, it leaves us vulnerable to many detrimental effects arising from disorder and defects both at the material level and at the system level. In fact, it is necessary to break time-reversal symmetry to produce important protective devices like isolators and circulators. This talk will describe how traveling wave interactions can be leveraged in photonic devices for producing strong symmetry breaking effects, with particular attention on acousto-optic and electro-optic methods. We then discuss how these approaches can help solve scaling challenges for photonic integrated circuits, especially in support of low-temperature quantum technologies and atom-photonic integrated systems. We present experimental demonstrations of record-setting integrated optical isolators without magneto-optics, how magneto-optic Faraday rotation can be emulated in other systems, and how the broader class of non-reciprocal behaviors can be used to enable robust devices that are immune to undesirable scattering and defects.

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