Microscopic Structure of Dipolar Surface Plasmons in Spherical Small Particles in a Broad Size Range

概要

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In a broad size range, we examine how dipolar strrface plastmons in spherical sraaall particlesare cornposed of their constittrent electronic transition processes. A series of transition processessatisfying specific selection rules are fotrnd to play the leading part iz't formation of the stxrface-plasmon unode. As the ntrnaber of these leading transition processes becomes larger with increasein size, the mode assumes taaore collective-excitation character, and evolves into a rauore counpletestrrface excitation having its indtrced charges tnore sharply localized around the surface. Otrrdecomposing analysis shows how the above transition processes create a strrface excitation andyield the giant resonance in a photoabsorption spectrunn.
社団法人日本物理学会の論文
1997-12-15