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SUMMARY:Self-assembled optical metamaterials
DTSTART:20150522T141500
DTSTAMP:20260503T121301Z
UID:37a5c94e67ed4ba13b247d393a6f0c00a335edd704c318bd4f1344ba
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Ullrich Steiner\, Adolphe Merkle Institute\, Fribourg\, 
 SuisseHomepage\nOrdered mesoporous structures made from plasmonic metals h
 ave recently attracted great attention because of the possibility to manuf
 acture optical materials that exhibit a negative refractive index.  These
  optical metamaterials intrinsically focus light beyond the diffraction li
 mit and are able to coherently guide light around objects\, “cloaking”
   them.  The challenge is however to manufacture well-defined materials 
 with sufficiently small periodicities that act as 3D metamaterials for vis
 ible light.\nIn my talk\, I will introduce a methodology that employs the 
 self-assmbly of block-copolymer for the manufacture of optical metamateria
 ls.  We target in particular the gyroid morphology\, which has three chir
 al axes\,  because structurally chiral materials are predicted to feature
  a negative refractive index.  We have investigated the replication of se
 lf-assembled polymer morphologies into gold and silver and have studied th
 eir optical properties.   The replicated gyroid morphology exhibits high
  transparency arising form the propagation of  strongly anisotropic plasm
 on modes that give rise to both linear and circular dichroism across the v
 isible region.
LOCATION:The aquarium (PH L1 503)  http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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