Time- and angle-resolved 2PPE studies of Pb nanowires on Si(557) (CROSBI ID 623815)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Sayed, Abdul Samad ; Mikšić Trontl, Vesna ; Ligges, Manuel ; Sandhofer, Mathias ; Agarwal, Ishita ; Avigo, Isabella ; Lückermann, Daniel ; Tegenkamp, Christoph ; Pfnür, Herbert ; Bovensiepen, Uwe
engleski
Time- and angle-resolved 2PPE studies of Pb nanowires on Si(557)
Strongly anisotropic systems, like, e.g., metallic nanowire arrays grown on semiconducting surfaces, are expected to exhibit significantly different electronic dispersion - along and perpendicular to the wire structure. Angle-resolved photoemission is an excellent tool to study electronic band dispersion, but is often limited to (i) one momentum direction in a single measurement and (ii) the occupied electronic structure. Here, we report on femtosecond-laser based two-photon photoemission experiments on Pb/Si(557) nanowires that map the unoccupied electronic structure. Using a position-sensitive time-of flight spectrometer, the dispersion along and perpendicular to the wires can be analyzed simultaneously in a single measurement. Furthermore, by delaying two light pulses with respect to each other, the lifetimes of these unoccupied electronic states can be measured in a pump-probe experiment. We present first time- and momentum-resolved studies on the unoccupied states in this system. We gratefully acknowledge funding by the DFG through FOR1700.
2PPE study
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
2014.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
Verhandlungen der Deutschen Physikalischen Gesellschaft. 2014
poster
30.03.2014-04.04.2014
Dresden, Njemačka