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2:00 p.m.-3:30 p.m.
1201 Physics Building
For More Information:
Yuri Kubota
x58285
ykubota@umd.edu
Title: Extreme Metamaterials
Speaker: Professor Nader Engheta
H. Nedwill Ramsey Professor
Department of Electrical and Systems Engineering
University of Pennsylvania
Abstract: In this talk, I discuss the merging of two phenomena, the extreme-parameter metamaterials with the plasmonic optics. It is well known that the surface plasmon
polaritons (SPP) in plasmonic structures possess apparent wavelengths along the metallic interfaces that are shorter than the free space wavelength. In the field of
metamaterials, materials with extreme values for relative permittivities (or permeability), e.g., epsilon-near-zero (ENZ) materials exhibit refractive index being near zero, resulting in essentially uniform phase and very long apparent wavelengths in such media. In my group we have been interested in exploring the merging of these two seemingly opposite features, by combining ENZ metamaterials with the SPP waves in plasmonic optics. We have been developing
and exploring fundamental concepts and various potential applications of extremeparameter plasmonic metamaterials. We have shown ENZ-based enhanced transmission through ultranarrow channels and bends with arbitrary shapes and
forms, we have theoretically studied enhancement of molecular emission near ENZ-inspired plasmonic structures, and confinement of highly intense electric field in a channel. We have also investigated how ENZ materials manipulate the phase patterns of beams. As another application of ENZ metamaterials, we have been investigating the scattering-cancelation-based plasmonic and metamaterial
cloaking using ENZ media. In this talk, I will give an overview of this ENZ-based plasmonics, will discuss exciting potentials and future ideas and possibilities.
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*/Biography/*
Nader Engheta is the H. Nedwill Ramsey Professor of Electrical and Systems Engineering, and Professor of Bioengineering, at the University of Pennsylvania. He received his B.S. degree in EE from the University of Tehran, and his M.S and Ph.D. degrees in EE from Caltech. Selected as one of the /Scientific American Magazine 50 Leaders in Science and Technology/ in 2006 for developing the concept of optical lumped nanocircuits, he is a Guggenheim Fellow, an IEEE Third Millennium Medalist, IEEE Fellow, American Physical Society Fellow, Optical Society of America Fellow, and the recipient of the 2008 /George H. Heilmeier Award for Excellence in Research/ from UPenn, the /Fulbright Naples Chair Award/, /NSF Presidential Young Investigator award/, the /UPS Foundation Distinguished Educator term Chair/, and several teaching awards including the /Christian F. and Mary R. Lindback Foundation Award and S. Reid Warren, Jr. Award/. His current research activities span a broad range of areas including metamaterials and plasmonics, nanooptics and nanophotonics, biologically-inspired sensing and imaging, miniaturized antennas and nanoantennas, physics and reverse-engineering of polarization vision in nature, mathematics of fractional operators, and physics of fields and waves phenomena. He has co-edited the book entitled “/Metamaterials: Physics and Engineering Explorations/” by Wiley-IEEE Press, 2006.
Host: Steven Anlage
This Event is For: Graduate • Faculty • Post-Docs
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