Chelaru, L.I.; Horn-von Hoegen, Michael; Thien, Dagmar; Meyer zu Heringdorf, Frank:
Fringe Fields in Nonlinear Photoemission Microscopy
In: Physical Review B : Condensed matter and materials physics, Vol. 73 (2006), No. 11, 115416 (5p)
2006article/chapter in journal
Physics (incl. Astronomy)Faculty of Physics » Experimental Physics
Related: 1 publication(s)
Title:
Fringe Fields in Nonlinear Photoemission Microscopy
Author:
Chelaru, L.I.;Horn-von Hoegen, MichaelUDE
GND
1201039908
LSF ID
10366
ORCID
0000-0003-0324-3457ORCID iD
Other
connected with university
;
Thien, DagmarUDE
LSF ID
10445
Other
connected with university
;
Meyer zu Heringdorf, FrankUDE
LSF ID
48700
ORCID
0000-0002-5878-2012ORCID iD
Other
connected with university
Year of publication:
2006

Abstract:

Self-organized Ag nanostructures have been investigated by photoemission electron microscopy where the electrons are generated by femtosecond laser pulses through a two-photon photoemission process. Bright and dark areas are observed around the nanostructures when they exceed a certain lateral dimension. The features are different for both directions of the polarization of the incoming light and s and p polarization. In p polarization the features consist of several interference fringes that are explained by diffraction. The photoemission yield of Ag nanowires also shows a dependence on the polarization direction of the incoming light with respect to the orientation of the nanowire. This is explained with a particle plasmon state in the Ag nanostructures that acts as the intermediate state for two-photon photoemission. Also, we present evidence of far-field mediating interaction between neighboring Ag nanostructures.