Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-23 18:27

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Conference: Bucharest University Faculty of Physics 2016 Meeting

Section: Theoretical Physics and Applied Mathematics

Title:

Multiple surface plasmons in an unbounded quantum plasma half-space

Authors:

D-I. PALADE (1,2)

Affiliation:

1) Faculty of Physics, University of Bucharest

2) National Institute of Laser Plasma and Radiation

E-mail

dragos.i.palade@gmail.com

Keywords:

Quantum plasma, surface plasmon, half-space, plasma oscillations

Abstract:

The propagation of surface plasmons on a quantum plasma half-space in the absence of any external confinement is investigated. By means of the Quantum Hydrodynamic Model in the electrostatic limit it is found that the equilibrium density profile is a smooth continuous function which, in the linear regime, supports multiple non-normal surface modes. Defining a spectrum function and using a cutting condition, the dispersion relations of these modes and their relevance for realistic dynamics are computed. It is found that the multiple surface plasmons present a significant red-shift with respect to the case of fully bounded quantum plasmas.