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SUMMARY:Magnetic\, chemical and electrical steering of light at the nanosc
 ale
DTSTART:20200221T151500
DTSTAMP:20260916T044056Z
UID:5625d82ede2d8b2fff5097282471a9bc216ea263a5c1749bc76ba9c8
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Alexandre DMITRIEV\, Department of Physics\, University 
 of Gothenburg\, Sweden\nOptics that can be changed in real time is set to 
 revolutionize the broadest set of technologies from the ultrafast optical 
 data processing and storage to the augmented/mixed reality and optical ran
 ging in self-driving vehicles. However\, what nature developed over the mi
 llions of years of evolution as a human eye\, able to dynamically change t
 he focal distance combined with fast vergence\, represents a largely unres
 olved technological challenge. Currently available means to dynamically tu
 ne the optics are either bulky and often extremely challenging to integrat
 e\, or intrinsically slow.\n\nWhile the scaling down of optics is realized
  by nanophotonics\, several approaches have been explored so far to reach 
 the dynamic tunability\, including mechanical deformation\, thermal or ref
 ractive index effects\, and all-optical non-linearities. We combine plasm
 onic and magnetic materials to devise various nano-optical systems that ar
 e controlled by the external magnetic field. These include chiral optics a
 nd biological/chemical sensors. The latest advances are to control the str
 ucture of such antennas by the externally-applied electrical bias or to co
 ntrol the light scattering by combining nanoantennas and externally-actuat
 ed liquid crystal elastomers.\n\nI will discuss the various low-cost botto
 m-up nanofabrication methods that we develop to produce and transfer at wi
 ll large surfaces with nanosized elements that can be used in nanophotovol
 taics\, thermal management\, biophysics and other fields.\n\n\n\n 
LOCATION:CE 1 5 https://plan.epfl.ch/?room==CE%201%205
STATUS:CONFIRMED
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