Coherent exciton-surface-plasmon-polariton interaction in hybrid metal-semiconductor nanostructures
| Autor: | Christoph Lienau, Vas. P. Kunets, J. E. Kihm, Erich Runge, S. Schwieger, Parinda Vasa, Yu. I. Mazur, Pradeep Srinivasan, Gregory J. Salamo, Eric G. Johnson, Dai-Sik Kim, R. Pomraenke |
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| Rok vydání: | 2007 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Condensed Matter::Other Exciton Physics::Optics General Physics and Astronomy Resonance Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Coupling (probability) Surface plasmon polariton Condensed Matter::Materials Science Quasiparticle Atomic physics Spectroscopy Biexciton Quantum well |
| Zdroj: | Physical review letters. 101(11) |
| ISSN: | 0031-9007 |
| Popis: | 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 $\ensuremath{\sim}7\text{ }\text{ }\mathrm{meV}$ and an increase in broadening by $\ensuremath{\sim}4\text{ }\text{ }\mathrm{meV}$ 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. |
| Databáze: | OpenAIRE |
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