Near-infrared saturable and reverse saturable absorption of ion beam synthesized VO2 nanocrystals

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dc.contributor.authorMundry, Jan
dc.contributor.authorKrenner, Hubert J.
dc.contributor.authorKarl, Helmut
dc.contributor.authorBetz, Markus
dc.date.accessioned2020-08-13T12:29:41Z
dc.date.available2020-08-13T12:29:41Z
dc.date.issued2020-06-17
dc.description.abstractWe investigate the nonlinear optical response of a thin film of ion-implanted VO2 nanocrystals with open aperture z-scans involving femtosecond near-infrared pulses. Beyond the established nonlinearity related to the insulator-metal phase transition of VO2, the metallic state features a pronounced saturable absorption for 100 fs pulses from a modelocked Yb:fiber source at = 1036 nm. In contrast, we find a pronounced reverse saturable absorption for 90 fs pulses in the telecom window at = 1550 nm. We attribute these nonlinearities to a transient red-shift of the plasmonic resonance of the nanocrystals, in line with the temperature dependence of the linear absorption and the theoretical expectation for electronic heating. Details of the transmissivity characteristics can be tailored by the lattice temperature and/or the size of the nanocrystals. The results hold promise for the use of VO2 nanocrystals as a saturable absorber, e.g., to mode-locked near-infrared lasers.en
dc.identifier.urihttp://hdl.handle.net/2003/39233
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-21150
dc.language.isoende
dc.relation.ispartofseriesOptical materials express;Vol. 10, Issue 7, pp. 1630-1640
dc.rightsOSA Open Access Publishing Agreementen
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OA
dc.subject.ddc530
dc.subject.rswkVanadiumdioxidde
dc.subject.rswkNanopartikelde
dc.subject.rswkOberflächenplasmonresonanzde
dc.subject.rswkPhasenumwandlungde
dc.titleNear-infrared saturable and reverse saturable absorption of ion beam synthesized VO2 nanocrystalsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationOptical materials express. Vol. 10. 2020, Issue 7, pp. 1630-1640en
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1364/OME.396099de

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