TODAY: Ognjen Ilic, 31-Oct-23, 12:20pm Central
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Ellad Tadmor
Oct 31, 2023, 10:41:51 AM10/31/23
to aem-solid...@umn.edu
AEM Mechanics Research Seminar
Tuesday 31-Oct-2023, 12:20pm Central
Prof. Ognjen Ilic
Department of Mechanical Engineering, University of Minnesota
Title: Metamaterials in Motion: Manipulating the Energy and the Momentum of Waves at the Subwavelength Scale
Abstract: The transport of waves, such as light and sound, can be radically transformed when waves interact with metamaterial structures with engineered subwavelength features. My group aims to understand and develop electromagnetic and acoustic metamaterials that can control wave-matter interactions in ways that are impossible with conventional materials. In the first part of my talk, I will present our work on acousto-mechanical metamaterials that can steer ultrasonic waves for contactless and programmable actuation. This versatile concept enables new actuation functions, including autonomous path following and contactless tractor beaming, that are facilitated by anomalous ultrasonic scattering and are beyond the limits of traditional wave-matter interactions. In the second part, I will discuss how the same ideas naturally carry over to optical systems. Light is a powerful tool to manipulate matter, with concepts such as optical traps and tweezers widely used across biology and bioengineering to microfluidics and quantum sensing, but typically limited to small objects and short distances. In contrast, our approach to designing nanoscale elements to control the momentum of light could open new frontiers in optomechanics such as macroscale optical levitation and long-range optical actuation. These concepts of nanoscale light-matter interactions could lead to ultralightweight and multi-functional structures and coatings with unique new terrestrial and space applications.
For more information, visit the AEM Mechanics Research Seminar website:
Tuesday 31-Oct-2023, 12:20pm Central
In-person: Room 402, Walter Library, University of Minnesota
Online: Webinar registration link
Department of Mechanical Engineering, University of Minnesota
Title: Metamaterials in Motion: Manipulating the Energy and the Momentum of Waves at the Subwavelength Scale
Abstract: The transport of waves, such as light and sound, can be radically transformed when waves interact with metamaterial structures with engineered subwavelength features. My group aims to understand and develop electromagnetic and acoustic metamaterials that can control wave-matter interactions in ways that are impossible with conventional materials. In the first part of my talk, I will present our work on acousto-mechanical metamaterials that can steer ultrasonic waves for contactless and programmable actuation. This versatile concept enables new actuation functions, including autonomous path following and contactless tractor beaming, that are facilitated by anomalous ultrasonic scattering and are beyond the limits of traditional wave-matter interactions. In the second part, I will discuss how the same ideas naturally carry over to optical systems. Light is a powerful tool to manipulate matter, with concepts such as optical traps and tweezers widely used across biology and bioengineering to microfluidics and quantum sensing, but typically limited to small objects and short distances. In contrast, our approach to designing nanoscale elements to control the momentum of light could open new frontiers in optomechanics such as macroscale optical levitation and long-range optical actuation. These concepts of nanoscale light-matter interactions could lead to ultralightweight and multi-functional structures and coatings with unique new terrestrial and space applications.
For more information, visit the AEM Mechanics Research Seminar website:
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Ellad B. Tadmor, Ph.D.
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
Russell J. Penrose Professor
Department of Aerospace Engineering and Mechanics
University of Minnesota
https://dept.aem.umn.edu/~tadmor/
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