Auch als elektronisches Dokument verfügbar: http://prl.aps.org/pdf/PRL/v101/i11/e116801
We report measurements of a coherent coupling between surface plasmon polaritons (SPP) and quantum well excitons in a hybrid metal-semiconductor nanostructure. The hybrid structure is designed to optimize the radiative exciton-SPP interaction which is probed by low-temperature, angle-resolved, far-field reflectivity spectroscopy. As a result of the coupling, a significant shift of ~7 meV and an increase in broadening by ~4 meV of the quantum well exciton resonance are observed. The experiments are corroborated by a phenomenological coupled-oscillator model predicting coupling strengths as large as 50 meV in structures with optimized detunings between the coupled exciton and SPP resonances. Such a strong interaction can, e.g., be used to enhance the luminescence yield of semiconductor quantum structures or to amplify SPP waves.
Physical review letters Ridge, NY : American Physical Society, 1958 101(2008), 11, Seite 116801-1-116801-4
Proceedings of the 2007 International Workshop on the Physics of Semiconductor Devices ; [1] Piscataway, NJ : IEEE Operations Center, 2007 (2007), Seite 396-398 XXXIV, 474 S.
von Janina Maultzsch ; Robert Pomraenke ; Stephanie Reich ; E. Chang ; D. Prezzi ; A. Ruini ; E. Molinari ; M. S. Strano ; Christian Thomsen ; Christoph Lienau
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