Plasmonic focusing on metal and semiconductor disks under radially polarized terahertz illumination

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dc.contributor.authorKaltenecker, K.
dc.contributor.authorWallauer, J.
dc.contributor.authorWaselikowski, S.
dc.contributor.authorHodapp, J.
dc.contributor.authorFischer, C.
dc.contributor.authorWinnerl, S.
dc.contributor.authorSchneider, H.
dc.contributor.authorFischer, B.
dc.contributor.authorWalther, M.
dc.contributor.conferenceInternational Conference on Infrared, Millimeter and Terahertz Waves (38th : 2013 : Mainz on the Rhine, Germany)
dc.date.issued2013
dc.description.abstractOptimal focusing of surface plasmon polaritons in the center of a metal disc illuminated by radially polarized terahertz pulses is demonstrated. Due to the cylinder symmetrical structure surface plasmons can be excited along the entire circumference, which interfere constructively in the center of the disk forming a sharp frequency-depended focal spot. We map the field distribution on the disk by THz near-field microscopy and compare our result to numerical simulations. For comparison, behavior under linearly polarized THz illumination is characterized. Furthermore, first results of semiconducting plasmonic lenses are presented.
dc.description.urihttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6665393
dc.identifier.citationIRMMW-THz, 2013 38th International Conference on Infrared, Millimeter and Terahertz Waves, Mainz on the Rhine, 1-6 September, 2013: 3 p.
dc.identifier.doi10.1109/IRMMW-THz.2013.6665612
dc.identifier.isbn9781467347174
dc.identifier.urihttp://hdl.handle.net/2440/83245
dc.language.isoen
dc.publisherIEEE
dc.publisher.placeUSA
dc.rights© 2013 IEEE
dc.source.urihttps://doi.org/10.1109/irmmw-thz.2013.6665612
dc.titlePlasmonic focusing on metal and semiconductor disks under radially polarized terahertz illumination
dc.typeConference paper
pubs.publication-statusPublished

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