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DTSTART:20220721T120000
DTEND:20220721T130000
LOCATION:von Karman-186\; WebEx
DESCRIPTION:Metasurface Optics for Space Applications\n\n \;\n\nDr. Tobias Wenger\, JPL Postdoctoral Fellow\n\n \;\n\nThursday\, July 21 @ 12:00 pm (PT) von Karman-186 and via WebEx\n\n\nAbstract:\nIn this presentation I will talk about nanophotonics\, more specifically metasurfaces &ndash\; subwavelength patterned surfaces &ndash\; and explain how this can be used for space applications. As recently displayed by the stunning images from the James Webb space telescope\, we often rely on recording the intensity of light (e.g. with a camera) to study the universe. However\, light fundamentally has several additional degrees of freedom which can carry information\, e.g. polarization\, phase\, and spectral content. While it is true that many conventional optical components can address these degrees of freedom individually (e.g.\, polarizers\, phase retarders\, and filters)\, metasurfaces enable general manipulations of phase\, amplitude\, and polarization on the nanoscale\, thereby providing ample opportunity to create new versions of existing components and even enable functionality not possible using conventional technologies. In the presentation I will cover several examples of metasurfaces I have been working on and explain their relevance for space applications. I will attempt to explain the working principles\, why metasurfaces can be useful\, as well as how we fabricate metasurfaces in a cleanroom.\n\nAbout the speaker:\nDr. Tobias Wenger is a postdoc at JPL&rsquo\;s microdevices laboratory (MDL) where his main efforts relate to nanophotonics - light at the nanoscale &ndash\; and how we can engineer structures and components in order to control light in new ways. Tobias received his PhD from Chalmers University of Technology\, Sweden\, where he worked on understanding the physical properties of plasmons in graphene.\n\nAt JPL\, Tobias is applying his knowledge of subwavelength electromagnetics to design metasurface-based optical components\, mainly for infrared wavelengths. Metasurfaces are a novel approach to optics which uses subwavelength elements for controlling the phase\, amplitude and polarization of transmitted and/or reflected electromagnetic radiation. Tobias research interests intersect optics\, computational electromagnetics\, and microfabrication and he enjoys both the practical and theoretical aspects of this work. During his postdoc time at MDL\, he has worked on metasurface-based optical concentrators\, IR detectors\, plasmonic filters\, wavefront sensing\, and grating replication.\n\nIn his free time Tobias enjoys surfing the California coastline and occasionally hiking in the San Gabriel mountains.\n\nWebEx Info: https://jpl.webex.com/jpl/j.php?MTID=mb14b734ca524be72607d4618231bd7cb\n\nMeeting number (access code): 2761 571 6818\nMeeting password: KUqxPMNg746\n\n\n\nPresenter : \nTobias Wenger
SUMMARY:Metasurface Optics for Space Applications
DTSTAMP:20240328T115452Z
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