Plasmon-Polaritonen an Oberflächen vonHybrid-Nanostrukturen aus magnetischen und dielektrischen Materialien
Zusammenfassung der Projektergebnisse
This project proposal was devoted to active plasmonics in which surface plasmon polaritons (SPPs) are controlled by an external stimulus such as a magnetic field, a femtosecond optical pulse and/or lattice vibrations. To enhance the interaction between an electromagnetic field and a magnetized medium we used periodic hybrid nanostructures involving a noble metal layer (Au) and a dielectric ferromagnetic layer (in our case bismuth substituted rare-earth iron garnet). Use of a low loss magnetic dielectric allowed demonstrating a significant enhancement of magnetooptical effects with high tunability and revealing novel magnetooptical effects originating from plasmonic excitations at nanoscale. In time-resolved studies we carefully elaborated the magnetization dynamics for the inverse Faraday effect under excitation with a train of circulary polarized femtosecond pulses. We also successfully demonstrated and investigated alternative approaches for ultrafast active control of SPPs using femtosecond pulses. Here the thermal diffusion of photo-excited electron hot spots in the metal constituent leads to a significant modification of the sub-ps cooling dynamics as manifested by the ultrafast optical response. Further, we achieved terahertz modulation of light in hybrid plasmonic-semiconductor structures using SPP enhanced excitation of optical phonons in the semiconductor constituent. The results of the project have been obtained in tight cooperation of two research teams at TU Dortmund and Lomonosov Moscow State University.
Projektbezogene Publikationen (Auswahl)
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Plasmon-mediated magneto-optical transparency, Nature Communications 4:2128 (2013)
V.I. Belotelov, L.E. Kreilkamp, I.A. Akimov, A.N. Kalish, D.A. Bykov, S. Kasture, V.J. Yallapragada, A.V. Gopal, A.M. Grishin, S.I. Khartsev, M. Nur-E- Alam, M. Vasiliev, L.L. Doskolovich, D.R. Yakovlev, K. Alameh, A.K. Zvezdin and M. Bayer
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Tuning of the transverse magneto-optical Kerr effect in magnetoplasmonic crystals, New J. Phys. 15, 075024 (2013)
M. Pohl, L.E. Kreilkamp, V.I. Belotelov, I.A. Akimov, A.N. Kalish, N.E. Khokhlov, V.J. Yallapragada, A.V. Gopal, M. Nur-E-Alam, M. Vasiliev, D.R. Yakovlev, K. Alameh, A.K. Zvezdin and M. Bayer
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Ultrafast photoinduced linear and circular optical anisotropy in the multiferroic hexagonal manganite YMnO3, Phys. Rev B 88, 195112 (2013)
M. Pohl, V.V. Pavlov, I.A. Akimov, V.N. Gridnev, R.V. Pisarev, D.R. Yakovlev, and M. Bayer
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Waveguide-plasmon polaritons enhance transverse magneto-optical Kerr effect, Phys. Rev X 3, 041019 (2013)
L.E. Kreilkamp, V.I. Belotelov, J.Y. Chin, S. Neutzner, D. Dregely, T. Wehlus, I.A. Akimov, M. Bayer, B. Stritzker, H. Giessen
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Magnetophotonic intensity effects in hybrid metal-dielectric structures, Phys. Rev. B 89, 045118 (2014)
V.I. Belotelov, L.E. Kreilkamp, A.N. Kalish, I.A. Akimov, D.A. Bykov, S. Kasture, V.J. Yallapragada, A.V. Gopal, A. M. Grishin, S. I. Khartsev, M. Nur- E-Alam, M. Vasiliev, L. L. Doskolovich, D. R. Yakovlev, K. Alameh, A. K. Zvezdin, and M. Bayer
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Transformation of mode polarization in gyrotropic plasmonic waveguides, Laser Phys. 24, 094006 (2014)
A. N. Kalish, D. O. Ignatyeva, V. I. Belotelov, L. E. Kreilkamp, I. A. Akimov, A.V. Gopal, M. Bayer and A. P. Sukhorukov
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Tunable Optical Nanocavity of Iron-garnet with a Buried Metal Layer, Materials 8, 3012-3023 (2015)
A.N. Kuz’michev, L.E. Kreilkamp, M. Nur-E-Alam, E. Bezus, M. Vasiliev, I.A. Akimov, K. Alameh, M. Bayer and V.I. Belotelov
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Terahertz dynamics of lattice vibrations in Au/CdTe plasmonic crystals: Photoinduced segregation of Te and enhancement of optical response, Phys. Rev. B 93, 125404 – Published 3 March 2016
L.E. Kreilkamp, I.A. Akimov, V.I. Belotelov, B.A. Glavin, L. Litvin, A. Rudzinski, M. Kahl, R. Jede, M. Wiater, T. Wojtowicz, G. Karczewski, D.R Yakovlev, and M. Bayer
