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Surface plasmons on rough surfaces

Поверхностные плазмоны на шероховатых поверхностях

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Il Nuovo Cimento B (1971-1996)

Summary

Experiments with surface plasmons on rough and sinusoidally corrugated surfaces of metals with quasi-free electrons are performed to study the changes of the dispersion relation. The result is that the eigenfrequency of the plasma oscillations is displaced and the damping is increased. The dependence of the displacement and of the damping on the height of the roughness is shown. The results are compared with calculated values.

Riassunto

Si effettuano esperimenti con plasmoni di superficie su superfici metalliche ruvide e corrugate sinusoidalmente tramite elettroni quasi liberi per studiare i cambiamenti della relazione di dispersione. Il risultato è che l’autofrequenza delle oscillazioni di plasma è spostata e lo smorzamento è aumentato. Si mostra la dipendenza dello spostamento e lo smorzamento dall’altezza della scabrosità. I risultati sono confrontati con i valori calcolati.

Резюме

Для исследования дисперсионного соотношения проводятся эксперименты с поверхностными плазмонами на шероховатой и синусоидальной поверхностях металлов с квазисвободными электронами. Обнаружено, что собственная частота плазменных осцилляций смещается и затухание увеличивается. Исследуется зависимость смещения и затухания от высоты шероховатостей. Полученные результаты сравниваются с вычисленными величинами.

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Footnotes

  1. See,e.g.,H. Raether:Surface Plasma Oscillations and Their Application, Physics of Thin Films, Vol.9 (New York, N. Y., 1976).

  2. D. Hornauer, H. Kapitza andH. Raether:J. Phys. D,7, L100 (1974).

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  3. A. J. Braundmeier jr. andE. T. Arakawa:Journ. Phys. Chem. Sol.,35, 517 (1974).

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  4. H. Kapitza:Opt. Comm.,16, 73 (1976).

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  5. H. Kapitza: unpublished (1976).

  6. D. Hornauer:Opt. Comm.,16, 76 (1976).

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  7. I. Pockrand andH. Raether:Opt. Comm.,18, 395 (1976).

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  8. I. Pockrand:Opt. Comm.,13, 311 (1975);Phys. Lett.,49 A, 259 (1974).

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  9. See alsoD. Heitmann andH. Raether:Surf. Sci.,59, 17 (1976).

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  10. These results are taken from recent measurements ofI. Pockrand on silver films whose thickness is much larger than that used in (7)..

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  11. E. Kröger andE. Kretschmann:Phys. Stat. Sol.,76 (b), 515 (1976).

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  12. E. Kretschmann:Opt. Comm.,10, 353 (1974).

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  13. Private communication of Dr.E. Kretschmann.

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Author notes

  1. H. Raether

    Present address: University of Hamburg, Hamburg

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    1. H. Raether
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    Raether, H. Surface plasmons on rough surfaces. Nuov Cim B 39, 817–822 (1977). https://doi.org/10.1007/BF02725829

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    • DOI: https://doi.org/10.1007/BF02725829

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