Dresden 2017 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 20: Focussed Session: Frontiers in Exploring and Applying Plasmonic Systems II
(Joint Session of CPP, DS, HL, MM, and O, organized by DS)

DS 20.5: Topical Talk

Dienstag, 21. März 2017, 11:45–12:15, CHE 89

Nonlocal response in plasmonic nanoparticles: How much quantum? — •N. Asger Mortensen — Technical University of Denmark

Plasmonics is commonly explored and interpreted within the framework of classical electrodynamics. On the other hand, with the increasing ability to explore plasmonics in nanostructures with yet smaller characteristic dimensions, intrinsic length scales of the electron gas are anticipated to manifest in a nonlocal plasmonic response and other quantum corrections to the light-matter interactions. In nanoparticles, nonlocal response promotes frequency blueshifts and nonlocal damping of high-order modes, as has been observed in single-particle EELS. As to the quantum mechanical origin of these effects, one can quantify the degree of nonclassical effects from an energy perspective. This provides a direct link between the experimentally observed resonance blueshift and the fraction of electromagnetic energy attributed to quantum degrees of freedom.