Título:
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Smith-Purcell radiation emission in aperiodic arrays
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Autor/a:
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Saavedra, J. R. M.; Castells-Graells, D.; García de Abajo, F. Javier
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Otros autores:
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Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques |
Abstract:
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We study the Smith-Purcell light emission produced by electrons moving parallel to linear aperiodic particle
arrays. This constitutes a generalization of this type of phenomenon from periodic to aperiodic structures. As in the
periodic case, the emission is found to exhibit intense features in its angular and frequency distributions, associated
with the condition of constructive interference between the contributions arising from different particles in the
array. This condition can also be expressed in terms of momentum conservation involving reciprocal wave-vector
transfers from the array. We consider two examples of quasiperiodic and hyperuniform aperiodic arrays that
allow us to illustrate this idea. Our study provides insight into the interaction of fast electrons with aperiodic
arrays characterized by strong features in reciprocal space, which dominate the electron-array coupling. |
Materia(s):
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-Àrees temàtiques de la UPC::Física -light -light emission -Òptica |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Artículo |
Editor:
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APS
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Compartir:
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