Increase In Raman Excitation Of Surface Polaritons With Surface Roughness Explained In Terms Of Wood Anomalies Of Gratings

Raymond Reinisch; Michel Neviere

doi:10.1117/12.965664

10 February 1981 Increase In Raman Excitation Of Surface Polaritons With Surface Roughness Explained In Terms Of Wood Anomalies Of Gratings

Raymond Reinisch, Michel Neviere

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Proceedings Volume 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I; (1981) https://doi.org/10.1117/12.965664
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

In a recent publication Ushioda et al. (Phys. Rev. B. 19, 8, (1979), 4012) (henceforth referred to as I) reported an experiment in which Raman excitation of surface polaritons was performed using several rough surfaces. The authors of I observed an increase, with surface roughness, of the Raman scattering intensity, but were unable to give a theoretical explanation of this surprising effect. We suggest an explanation which is based on the similarity existing between Raman excitation of surface polaritons of frequency w along a grating and grating generation of surface polaritons using an incident E.M. wave of the same frequency co. We determine the surface polariton wave along the grating and find a strong enhancement of its intensity when increasing the groove depth. Thus there is a good qualitative agreement between our results and those published in I. This allows us to show that the phenomenon observed by the authors of I is related to the existence of Wood anomalies of gratings.

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Raymond Reinisch and Michel Neviere "Increase In Raman Excitation Of Surface Polaritons With Surface Roughness Explained In Terms Of Wood Anomalies Of Gratings", Proc. SPIE 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I, (10 February 1981); https://doi.org/10.1117/12.965664

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KEYWORDS

Polaritons

Surface roughness

Raman spectroscopy

Diffraction gratings

Raman scattering

Surface plasmons

Diffraction

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