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TZID:Europe/Paris
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UID:1-324@lptms.universite-paris-saclay.fr
DTSTART:20150120T110000Z
DTEND:20150120T120000Z
DTSTAMP:20150113T090842Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-davide-porcello/
SUMMARY:Séminaire du LPTMS: Davide Forcella - LPTMS\, salle 201\, 2ème é
 tage\, Bât 100\, Campus d'Orsay - 20 Jan 15 11:00
DESCRIPTION:Electromagnetic properties of viscous charged fluids\nDavide Fo
 rcella (Université Libre de Bruxelles)\nRecently the gauge/gravity corres
 pondence has provided new interesting applications to high energy strongly
  coupled plasmas and strongly correlated condensed matter systems. At the 
 same time\, in an apparently unrelated field\, there have been enormous pr
 ogresses in the ability to engineer electromagnetic devices with exotic pr
 operties: such as negative refraction (energy and phase velocity for the e
 lectromagnetic field in the medium are in opposite directions)\, cloaking\
 , photonics black-holes\, etc.\nIn the talk\, building on these two recent
  developments\, I will discuss the electromagnetic properties of viscous c
 harged fluids\, consisting for example of electrons in certain solids or h
 igh energy physics plasmas. In particular I will show that finite viscosit
 y leads to multiple modes of evanescent electromagnetic waves at a given f
 requency\, one of which is characterised by a negative index of refraction
 .\nI will then underline the concept of electron viscosity in actual elect
 ron systems (rarely discussed in literature and not measured in experiment
 s yet) in condensed matter and its consequences on the electromagnetic res
 ponse. In particular I will discuss how optical spectroscopy can be used t
 o probe the electron viscosity. Indeed finite viscosity has the effect to 
 decrease the reflectivity of a metallic surface\, and support the occurren
 ce\, in a half-infinite sample\, of oscillations of the electromagnetic fi
 eld intensity as a function of distance from the interface.\nI will conclu
 de with some comments on future perspectives and applications.
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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