Femtosecond measurements of surface-state-electron dynamics on nanostructured Ni surfaces

Author

Smadici, S. ; Shen, X.J. ; Radojevic, A. ; Mocuta, D. ; Osgood, R.M.

Author_Institution

Columbia Radiat. Lab., Columbia Univ., New York, NY, USA

fYear

2001

fDate

11-11 May 2001

Firstpage

105

Lastpage

106

Abstract

Summary form only given. We will describe our fs, two-photon photoemission measurements of electron lifetimes and dispersion curves on regular arrays of /spl sim/16 /spl Aring/ wide Ni steps, decorated with monolayer stripes of Ag. The experiments have measured the lifetimes and dispersive properties of the occupied surface and normally unoccupied image electron states. For the first time, we observed band-folding of an induced surface state with a controllable bandwidth.

Keywords

carrier lifetime; high-speed optical techniques; nanostructured materials; nickel; optical pumping; photoemission; surface states; two-photon processes; 16 angstrom; Ag monolayer stripes; Ag-Ni; Ni; band-folding; controllable bandwidth; dispersion curves; electron lifetimes; induced surface state; nanostructured Ni surfaces; normally unoccupied image electron states; occupied surface electron states; regular Ni step arrays; surface electron dispersive properties; surface electron lifetimes; surface-state-electron dynamics; two-photon photoemission measurements; Dielectric measurements; Electrons; Energy exchange; Energy measurement; Extraterrestrial measurements; Gold; Plasmons; Pulse measurements; Reflectivity; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2001. QELS '01. Technical Digest. Summaries of Papers Presented at the

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-663-X

Type

conf

DOI

10.1109/QELS.2001.961917

Filename

961917