Surface and volume plasmons in metallic nanospheres in semiclassical RPA-type approach; near-field coupling of surface plasmons with semiconductor substrate

Abstract

The random-phase-approximation semiclassical scheme for description of plasmon excitations in large metallic nanospheres, with radius range 10-60 nm, is formulated in an all-analytical version. The spectrum of plasmons is determined including both surface and volume type excitations and their mutual connections. The various channels for damping of surface plasmons are evaluated and the relevant resonance shifts are compared with the experimental data for metallic nanoparticles of different size located in dielectric medium or on the semiconductor substrate. The strong enhancement of energy transfer from the surface plasmon oscillations to the substrate semiconductor is explained in the regime of a near-field coupling in agreement with recent experimental observations for metallically nanomodified photo-diode systems.

References in corpus (4)

• Fragmentation of the photoabsorption strength in neutral and charged metal microclusters
• Surface plasmon in metallic nanoparticles: renormalization effects due to electron-hole excitations
• Lifetime of the first and second collective excitations in metallic nanoparticles
• Radius dependent shift of surface plasmon frequency in large metallic nanospheres: theory and experiment

Cited by in corpus (1)

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