Plasma Resonances in Small Metallic Particles

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Abstract
The observed positions of optical absorption bands arising from plasma resonances in small metallic particles are tabulated and compared to the positions calculated from the optical constants of the metals. For very small spherical particles the calculated positions are close to those observed; for larger or non-spherical particles there are deviations between observed and calculated positions. Similar bands should exist in certain metals in which they have not been observed.