Physics & Astronomy Colloquium - Professor Nader Engheta; University of Pennsylvania Title: "Structuring Light with Extreme Metamaterials"
Zoom Link: https://uiowa.zoom.us/j/99600097237
Meeting ID: 996 0009 7237
Physics & Astronomy Colloquium
Professor Nader Engheta; Department of Physics & Astronomy; University of Pennsylvania
Title: Structuring Light with Extreme Metamaterials
Abstract: Materials are often used to manipulate waves. Metamaterials have provided far-reaching possibilities in achieving “extremes” in such wave-matter interaction. Various exciting functionalities have been achieved in exploiting metamaterials and metasurfaces in nanophotonics and nano-optics. We have been exploring how extreme metamaterials can give us new platforms in metaphotonics for exploiting waves to do certain useful functions for us. Several research topics are being investigated in my group. In one of these programs, we have been developing metastructure platforms that can perform analog computation such as solving integral and differential equations and inverting matrices with waves as waves interact with them. Such “metamaterial machines” can function as wave-based, near-speed-of-light analog computing machines, suitable for micro- and nanoscale integration. Another research program is the near-zero-index (NZI) media in which the effective relative permittivity and/or relative permeability can attain near-zero values around the operating frequencies of interest. In such NZI structures, effective wavelength “stretches”, and consequently numerous unprecedented wave phenomena emerge. In this talk, I will present some of our ongoing work on extreme material platforms for metaphotonics, and will forecast possible future research directions in these paradigms