Coherent exciton-surface plasmon polariton interactions in hybrid metal semiconductor nanostructures

被引:1
|
作者
Vasa, P. [1 ,2 ]
Pomraenke, R. [1 ]
Schwieger, S. [2 ]
Mazur, Yu. I. [2 ,3 ]
Kunets, Vas. [3 ]
Srinivasan, P.
Johnson, E.
Runge, E.
Salamo, G.
Lienau, C. [1 ]
机构
[1] Carl von Ossietzky Univ Oldenburg, Inst Phys, D-26111 Oldenburg, Germany
[2] Tech Univ Ilmenau, Theoret Phys I, D-98684 Ilmenau, Germany
[3] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA
关键词
QUANTUM; MICROCAVITY; EMISSION;
D O I
10.1002/pssc.200880329
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report on an experimental study of the optical properties of a metal-semiconductor hybrid structure consisting of a gold grating on a GaAs quantum well (QW). Our experiments reveal a coherent coupling between the surface plasmon polaritons (SPP) excited on a metal grating and the QW excitons. The hybrid structure is designed to optimize the radiative exciton-SPP interaction which is probed by low-temperature, angle-resolved far-field reflection spectroscopy. As a result of the coupling, a significant shift of similar to 7 meV and an increase in broadening by similar to 4 meV of the QW exciton resonance are observed. The results are explained with the help of a phenomenological two layered model, predicting coupling strengths as large as 30 meV. Such a strong interaction can, e.g. be used to enhance the luminescence yield of semiconductor quantum structures or to amplify SPP waves. [GRAPHICS] Experimentally measured angle-resolved low temperature reflectivity spectra of a multilayered metal-semi conductor hybrid nanostructure. The spectra are obtained after subtracting the SPP contribution and reveal a clear shift of the resonance and a slight change in the radiative damping of the heavy hole (HH) and light hole (LH) QW resonances as a result of the coherent coupling between the two resonances. Red dash-dotted lines indicate the SPP, QW and substrate dispersions. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码:466 / +
页数:2
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