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SUMMARY:IEM Distinguished Lecturers Seminar: Extreme Ultraviolet Metaoptic
 s
DTSTART:20240315T131500
DTEND:20240315T140000
DTSTAMP:20260928T175415Z
UID:a4e14fe4adac5858100312504547308e4435bdfc66d2f26a23d7c468
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Marcus Ossiander\,\nGraz University of Technology\, Graz
 \, Austria / Harvard University\, Cambridge\, United States\nThe seminar w
 ill take place in ELA 1 and will be simultaneously broadcasted in Neuchâ
 tel Campus MC B1 273.\n\nCoffee and cookies will be served from 13:00\n\n
 \nAbstract\nExtreme ultraviolet (EUV) light enables attosecond physics and
  nanoscale semiconductor lithography. Unfortunately\, all materials absorb
  it due to its large photon energy\, and no transmissive optics exist. In 
 my talk\, I will introduce how we overcome this lack of optical elements u
 sing ultrathin metasurfaces. These novel optics comprise millions of high-
 refractive-index nanopillars on flat substrates. The small extent of these
  building blocks allows researchers to mold the spatial phase of light on 
 the sub-wavelength scale\, an ability that currently revolutionizes the ha
 ndling of visible light. However\, for the EUV spectrum\, no high-refracti
 ve-index materials exist. I will introduce how holes in silicon can act as
  guiding structures for EUV light\, how we can exploit this fact to create
  metaoptics for 50-nm radiation\, how we manufacture and characterize such
  elements\, and the possible applications enabled by this first universal 
 transmissive optics technology for the EUV. Beyond the spatial phase\, met
 asurfaces can shape the temporal phase of light. We exploit this capabilit
 y to manufacture metasurfaces with negative group delay dispersion in the 
 visible that compress ultrafast laser pulses in transmission.\n\nShort bio
 graphy\nMarcus Ossiander explores the use of metasurfaces in attosecond mi
 croscopy at the Graz University of Technology. His research is funded by a
 n ERC Starting Grant and an FWF Start Grant. Marcus is also a research ass
 ociate at Harvard University\, where he pursued a postdoctoral scholarship
  with Federico Capasso as an Alexander von Humboldt Foundation Feodor-Lyne
 n Fellow. There\, he develops metasurfaces for ultrashort laser pulses and
  cavity applications. Before\, Marcus investigated the attosecond dynamics
  of carriers in solid-state materials and gases at the Max-Planck Institut
 e of Quantum Optics\, working with Ferenc Krausz\, Reinhard Kienberger\, a
 nd Martin Schultze.\n 
LOCATION:ELA 1 https://plan.epfl.ch/?room==ELA%201 https://epfl.zoom.us/j/
 67317987786
STATUS:CONFIRMED
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