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SUMMARY:SELF-ASSEMBLED OPTICAL METAMATERIALS
DTSTART:20150522T141500
DTSTAMP:20260504T011811Z
UID:01871af7cf79f02c0f3305cec7d3a3704071fcb5411e89bcbe3a3535
CATEGORIES:Miscellaneous
DESCRIPTION:Prof. Ullrich Steiner\, Adolphe Merkle Institute\, Université
  de Fribourg\, Suisse\nOrdered mesoporous structures made from plasmonic m
 etals have recently attracted great attention because of the possibility t
 o manufacture optical materials that exhibit a negative refractive index.
   These optical metamaterials intrinsically focus light beyond the diffra
 ction limit and are able to coherently guide light around objects\, “clo
 aking”  them.  The challenge is however to manufacture well-defined ma
 terials with sufficiently small periodicities that act as 3D metamaterials
  for visible light.\nIn my talk\, I will introduce a methodology that empl
 oys the self-assmbly of block-copolymer for the manufacture of optical met
 amaterials.  We target in particular the gyroid morphology\, which has th
 ree chiral axes\,  because structurally chiral materials are predicted to
  feature a negative refractive index.  We have investigated the replicati
 on of self-assembled polymer morphologies into gold and silver and have st
 udied their optical properties.   The replicated gyroid morphology exhib
 its high transparency arising form the propagation of  strongly anisotrop
 ic plasmon modes that give rise to both linear and circular dichroism acro
 ss the visible region.
LOCATION:PH L1 503 (Aquarium) http://plan.epfl.ch/?room=PHL1503
STATUS:CANCELLED
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