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Towards First Optical Tellegen Metamaterials

Hosted By: NonImaging Optical Design Technical Group

05 June 2024 11:00 - 12:00

Eastern Daylight/Summer Time (US & Canada) (UTC -04:00)

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The nonreciprocal magnetoelectric (Tellegen) effect promises a multitude of exciting applications in connection to fundamental (e.g., axion electrodynamics) and applied physics (e.g., magnetless isolators). Notably, in the optical spectrum, there are no materials with noticeable and controllable magnetoelectric effects.

In this webinar hosted by the Nonlmaging Optical Design Technical Group, Viktar Asadchy will discuss the first realization of a three-dimensional metamaterial with an isotropic and resonant Tellegen response in the visible frequency range. The proposed metamaterial does not need external magnetization or temporal modulation and can be fabricated using readily available nanofabrication techniques and materials. Dr. Asadchy will also discuss his ongoing experimental efforts.

Subject Matter Level:
Intermediate - Assumes basic knowledge of the topic

What You Will Learn:
• Relation and differences between reciprocal chiral and nonreciprocal Tellegen effects
• Peculiarities of light propagation in nonreciprocal Tellegen media
• Notion of nonreciprocity for light propagation

Who Should Attend:
• Those who are interested in exotic light phenomena in complex media
• Those who work on topics related to magneto-optics, chirality, or metamaterials

About the Presenter: Viktar Asadchy from Aalto University

Viktar S. Asadchy received the Doctor of Science degree in Electrical Engineering from Aalto University, Finland in 2017. From 2019 until 2022, he was a Postdoctoral Fellow at the Department of Electrical Engineering, Stanford University, CA, USA. He is currently an Assistant Professor at the Department of Electronics and Nanoengineering at Aalto University, Finland. Dr. Asadchy is an Elected Associate Member of URSI. He was awarded the Jorma Ollila Fellowship in 2018, the Finnish Foundation for Technology Promotion in 2018, and the Aalto Dissertation Award in 2017. His research has been recognized with the Sergei A. Schelkunoff Transactions Prize Paper Award in 2019 and the best Young Scientist Best Paper Award (First Prize) at URSI EMTS 2019. He has published 2 book chapters, more than 50 journal articles, and has given 6 invited talks. His main research interests include metasurfaces, metamaterials, photonic crystals, time-varying systems, and nanophotonics. 

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