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CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3536
DTSTART:20150320T203000Z
DTEND:20150320T213000Z
DTSTAMP:20260413T180842Z
LAST-MODIFIED:20150306T203340Z
LOCATION:3:30 pm\, 2241 Chamberlin Hall (coffee at 4:30 pm)
SUMMARY:Molding the Flow of Light Using Metasurfaces and Metamaterials
  \, Physics Department Colloquium\, Gennady Shvets\, University of Tex
 as at Austin
DESCRIPTION:Metamaterials are artificial electromagnetic materials exh
 ibiting unusual optical responses that are difficult to elicit from na
 turally-occurring media. Those include negative refractive index\, str
 ong magneto-electric response\, and strong concentration of optical en
 ergy. Metamaterials and their two-dimensional implementations (metasur
 faces) represent a remarkably versatile platform for light manipulatio
 n\, biological and chemical sensing\, and nonlinear optics. Many of th
 ese applications rely on the resonant nature of metamaterials\, which 
 is the basis for extreme spectrally selective concentration of optical
  energy in the near field. In addition\, metamaterial-based optical de
 vices lend themselves to considerable miniaturization because of their
  sub-wavelength features. I will review the history of optical metamat
 erials\, which is now fifteen years in the making\, and review some of
  the more recent trends in metamaterials research and applications usi
 ng the examples of my group’s work. Those include (i) the developmen
 t of “active” (i.e. rapidly tunable and reconfigurable) metasurfac
 es functionalized with single-layer graphene\, (ii) applications of me
 tamaterials to chemical and biological sensing of proteins and cellula
 r membranes\, and (iii) the development of the so-called photonic topo
 logical insulators that emulate the eponymous electronic materials by 
 using bianisotropic (also known as chiral or magneto-electric) metamat
 erials.   Recent experimental results covering a wide swath of the ele
 ctromagnetic spectrum (from microwaves to infrared light) will be pres
 ented. 
URL:https://www.physics.wisc.edu/events/?id=3536
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