A model simplification of dielectric responses and metal surface electrodynamics
Résumé
First the dielectric response of a bulk free electron metal is simplified so that it contains both collective mode (plasmon) and single particle mode structure, taken up by one single effective electron-hole pair mode of appropriate spectral strength. Then the enhanced local excitation of electron hole pairs in the surface region is modelled by addition of a phenomenological term with empirically adjustable amplitude. This provides an approximate surface response function. The first model yields very good results for the internal photoyield. The second is supplemented with a simplified surface barrier (a square step with the jellium edge withdrawn to ensure charge conservation) and corresponding electronic wavefunctions. This yields fairly good results for the total photoyield, while providing a very substantial simplification.
Origine : Accord explicite pour ce dépôt
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