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Coherent Exciton–Surface-Plasmon-Polariton Interaction in Hybrid Metal-Semiconductor Nanostructures

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 – Published 8 September 2008
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Abstract

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 7meV and an increase in broadening by 4meV 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.

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  • Received 18 December 2007

DOI:https://doi.org/10.1103/PhysRevLett.101.116801

©2008 American Physical Society

Authors & Affiliations

P. Vasa1,2, R. Pomraenke1, S. Schwieger2, Yu. I. Mazur3, Vas. Kunets3, P. Srinivasan4, E. Johnson4, J. E. Kihm5, D. S. Kim5, E. Runge2, G. Salamo3, and C. Lienau1,*

  • 1Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg, Germany
  • 2Technische Universität Ilmenau, Fachgebiet Theoretische Physik I, Postfach 100565, D-98684 Ilmenau, Germany
  • 3Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
  • 4The Center for Optoelectronics and Optical Communications, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, USA
  • 5School of Physics, Seoul National University, Seoul 151-742, Korea

  • *christoph.lienau@uni-oldenburg.de

See Also

Light and Electrons Cooperate

Michael Schirber
Phys. Rev. Focus 22, 9 (2008)

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Issue

Vol. 101, Iss. 11 — 12 September 2008

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