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DS: Fachverband Dünne Schichten

DS 36: Plasmonics and Nanophotonics HL-I (jointly with HL and O)

DS 36.1: Vortrag

Mittwoch, 16. März 2011, 10:15–10:30, POT 251

Optical Gain in Rolled-up Semiconductor/Metal Metamaterials — Stephan Schwaiger, Markus Broell, Ricardo Costa, Matthias Klingbeil, Aune Koitmae, Wolfgang Hansen, Detlef Heitmann, and •Stefan Mendach — Institute for Applied Physics, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg, Germany

Stimulated emission from optically active gain material is one of the most promising ways to solve the problem of losses in metamaterials [1, 2]. Here, we present gain measurements on rolled-up semiconductor/metal hybrid metamaterials [3] containing InGaAs quantum wells. We find a characteristic increase and decrease of the transmission through the metamaterial when optically pumping the quantum well. We observe positive gain of up to 15% at the high energy tails of the photoluminescence peaks of the quantum well and negative gain of similar magnitude at the low energy tails. This behaviour can be well reproduced with transfer matrix calculations which model each peak in the quantum well photoluminescence by a Lorentz oscillator.

[1] Y. Sivan, S. Xiao, U. K. Chettiar, A.V. Kildishev, and V. M. Shalaev, Opt. Exp. 26, 24060 (2009). [2] S. Xiao, V. P. Drachev, A.V. Kildishev, X. Ni, U. K. Chettiar, H.-K. Yuan, and V.M. Shalaev, Nature 466, 735 (2010). [3] S. Schwaiger, M. Bröll, A. Krohn, A. Stemmann, C. Heyn, Y. Stark, D. Stickler, D. Heitmann, and S. Mendach, Physical Review Letters 102, 163903 (2009)