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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

Sayed, Abdul Samad ; Mikšić Trontl, Vesna ; Ligges, Manuel ; Sandhofer, Mathias ; Agarwal, Ishita ; Avigo, Isabella ; Lückermann, Daniel ; Tegenkamp, Christoph ; Pfnür, Herbert ; Bovensiepen, Uwe Time- and angle-resolved 2PPE studies of Pb nanowires on Si(557). 2014

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

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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

Povezanost rada

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