Title :
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
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;
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
DOI :
10.1109/QELS.2001.961917
