| Exciton polaritons in one-dimensional metal-semiconductor photonic crystals. | |
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MedLine Citation:
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PMID: 19205244 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We investigate theoretically the coupling of exciton with light in a one-dimensional photonic crystal. The unit cell of the crystal consists of two alternating layers, namely a metallic layer and a semiconductor one. The frequency-dependent dielectric function of the metal is described by the Drude model, whereas for the semiconductor we use a nonlocal excitonic dielectric function. The polariton dispersion for s-polarized modes in the metal-semiconductor photonic crystal is compared with that for a dielectric-semiconductor photonic crystal. Because of the metal layers, a low-frequency gap appears in the photonic band structure. The presence of the semiconductor gives rise to photonic bands associated with the coupling of light with size-quantized excitón states. At frequencies above the longitudinal exciton frequency, the photonic band structure exhibits anticrossing phenomena produced by the upper exciton-polariton mode and size-quantized excitons. It is found that the anticrossing phenomena in the metal-semiconductor photonic crystal occur at higher frequencies in comparison with the dielectric-semiconductor case. |
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Authors:
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R Márquez-Islas; B Flores-Desirena; F Pérez-Rodríguez |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of nanoscience and nanotechnology Volume: 8 ISSN: 1533-4880 ISO Abbreviation: J Nanosci Nanotechnol Publication Date: 2008 Dec |
Date Detail:
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Created Date: 2009-02-11 Completed Date: 2009-03-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101088195 Medline TA: J Nanosci Nanotechnol Country: United States |
Other Details:
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Languages: eng Pagination: 6584-8 Citation Subset: - |
Affiliation:
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Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Puebla, Apdo. Post. 1152, Puebla, Pue. 72000, México. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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