Purely quadratic dispersion of surface plasmon in Ag/Ni(111): the influence of electron confinement

Abstract

Surface plasmon dispersion in nanoscale thin Ag films deposited onto the Ni(111) surface was investigated by angle‐resolved electron energy loss spectroscopy. We found that the dispersion curve contains only the quadratic term. The vanishing of the linear term was ascribed to the presence in the film of Ag 5sp‐related quantum well states. Screening effects enhanced by electron confinement in Ag quantum well states push the position of the centroid of the induced charge of the surface plasmon less inside the interface compared to other Ag systems, rendering null the linear coefficient of the dispersion curve. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

“…The substrate was cleaned by repeated cycles of ion sputtering and annealing at 1300 K. Surface cleanliness and order were checked using Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED) measurements, respectively. 27,28 MLG has been obtained by dosing ethylene onto the clean Pt(111) substrate at 1150 K. Thus, the graphene sheet is intrinsically thermally stable up to such preparation temperature, as shown in Ref. 29.…”

O2 dissociation in Na-modified gold ultrathin layer on Cu(111)

“…Measurements were carried out in a UHV chamber operating at a base pressure of 5·10 -9 Pa described elsewhere [132][133][134]. The sample was a single crystal of Cu (111).…”

Tunable Multi-Channel Filtering Using 1-D Photonic Quantum Well Structures

“…The quantity of information carried by an N channel filter is N times that of a single channel filter. Both semiconductor [15][16][17] and metal [18][19][20] quantum well (QW) structures have attracted tremendous attention in fundamental studies as well as possible technological applications. Thus, it is expected that their photonic counterparts, photonic quantum well (PQW) structure, are also attractive materials for intensive research [21][22].…”