On the coupling of size-quantized excitons with light in one-dimensional dielectric-semiconductor photonic crystals
The optical properties of exciton polaritons in one-dimensional photonic crystals are theoretically investigated. The periodic photonic structure is formed by two alternating layers, namely a local dielectric layer and a thin semiconductor one which is characterized by a nonlocal excitonic dielectri...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | México |
| Institución: | Universidad Autónoma Benito Juárez de Oaxaca |
| Repositorio: | Redalyc-UABJO |
| OAI Identifier: | oai:redalyc.org:57019061013 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57019061013 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Exciton photonic crystals semiconductor nanostructures |
| Sumario: | The optical properties of exciton polaritons in one-dimensional photonic crystals are theoretically investigated. The periodic photonic structure is formed by two alternating layers, namely a local dielectric layer and a thin semiconductor one which is characterized by a nonlocal excitonic dielectric function. We calculate reflectivity spectra for one-dimensional MgO-CuCl photonic crystals, which exhibit a rich resonance structure because of the optical manifestation of size-quantized excitons. We study the changes in the resonance structure as the thickness of the thin semiconductor layer is varied. It is found that odd quantized-exciton modes are well manifest in the optical spectra in comparison with even states. We have also investigated the effect of both homogeneous bulk damping and interface-induced broadening upon the reflectivity resonances. The broadening due to interface disorder is calculated with the self-consistent Green's function method. |
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