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- From: Szeminárium koordinátor <sem-admin AT szfki.hu>
- To: SZFI User <szfkiuser AT szfki.hu>,Fizinfo <fizinfo AT lists.kfki.hu>
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- Subject: [Fizinfo] Szemináriumok - Seminars: Marcus Ossiander
- Date: Thu, 18 Apr 2024 06:00:01 +0200 (CEST)
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SZFI SeminarMarcus OssianderGraz University of Technology (host: Dombi
Péter)Metaoptics for Extreme-Ultraviolet and Ultrashort Laser PulsesTuesday,
23 April 2024, 10:00, KFKI Campus, Bldg. 1, 2nd floor, Conference RoomExtreme
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 using 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 handling of visible
light. However, for the EUV spectrum, no high-refractive-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, metasurfaces can shape the
temporal phase of light. We exploit this capability to manufacture
metasurfaces with negative group delay dispersion in the visible that
compress ultrafast laser pulses in transmission. Minden érdeklődőt
szívesen látunk! - Everyone is welcome to attend.Attila Nagysem-admin AT szfki.hu
- [Fizinfo] Szemináriumok - Seminars: Marcus Ossiander, Szeminárium koordinátor, 04/18/2024
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