Regensburg 2010 – scientific programme
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O: Fachverband Oberflächenphysik
O 72: Plasmonics and Nanooptics VI
O 72.9: Talk
Thursday, March 25, 2010, 17:00–17:15, H32
Loss compensation of surface plasmon polaritons in multilayer structures with optically pumped gain media — Patrick Scholz1,2, •Stephan Schwieger1, and Erich Runge1 — 1Institut für Physik and Institut für Mikro- und Nanotechnologien, Technische Universität Ilmenau, 98693 Ilmenau, Germany — 2Climate Science Division, Alfred Wegener Institut für Polar- und Meeresforschung, 27570 Bremerhaven, Germany
Surface plasmon polaritons (SPPs) that are excited at metal gratings have large losses due to metallic absorption and re-radiation into propagating far-field modes. These losses can be possibly compensated by energy transfer from thin layers of optically excited media, such as semiconductor quantum wells in close vicinity to the metal surface [1,2]. In this contribution, the loss compensation is investigated theoretically as a function of the geometry of the sample. Parameters, such as the grating period, the slit width, the thickness of the metal film, and the spatial separation between the quantum well and the metal are varied. Furthermore, the formation of coupled SPP-exciton modes and some of their properties, as, e.g., their life times, propagation lengths, and group velocities, are discussed.
P. Vasa, R. Pomraenke, S. Schwieger, Yu. I. Mazur, Vas. Kunets, P. Srinivasan, E. Johnson, J. E. Kihm, D. S. Kim, E. Runge, G. Salamo, and C. Lienau, Phys. Rev. Lett. 101, 116801 (2008).
S. Schwieger, P. Vasa, and E. Runge, Phys. Stat. Sol. (b) 245, 1071(2008).
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