Onset of 3D collective response in bimetallic jellium films: Surface and mode sensitivity

E. L. Yuh; E. G. Gwinn; P. R. Pinsukanjana; W. L. Schaich; P. F. Hopkins; A. C. Gossard

doi:10.1103/PhysRevLett.71.2126

Onset of 3D collective response in bimetallic jellium films: Surface and mode sensitivity

E. L. Yuh, E. G. Gwinn, P. R. Pinsukanjana, W. L. Schaich, P. F. Hopkins, and A. C. Gossard

Phys. Rev. Lett. 71, 2126 – Published 27 September 1993

Abstract

We use experimental and calculated excitation spectra of bimetallic jellium films with widths of up to a few Fermi wavelengths to explore how excitations of a thin metal with internal density gradients evolve into surface plasmons of a three-dimensional layer. We find that the onset of 3D plasmons is mode specific, and sensitive to surface potentials, even for small surface wave vectors.

Received 15 April 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.2126

Authors & Affiliations

E. L. Yuh, E. G. Gwinn, P. R. Pinsukanjana, W. L. Schaich, P. F. Hopkins, and A. C. Gossard

Department of Physics, University of California at Santa Barbara, Santa Barbara, California 93106
Department of Physics, Indiana University, Bloomington, Indiana 47405
Electrical and Computer Engineering Materials Departments, University of California at Santa Barbara, Santa Barbara, California 93106