Femtosecond surface plasmon interferometry.
We demonstrate femtosecond plasmonic interferometry with a novel geometry. The plasmonic microinterferometer consists of a tilted slit-groove pair. This arrangement allows for (i) interferometric measurements at a single wavelength with a single microinterferometer and (ii) unambiguous discrimination between changes in real and imaginary parts of the metal dielectric function. The performance is demonstrated by monitoring the sub-picosecond dynamics of hot electrons in gold.
Temnov
Vasily V
VV
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. temnov@mit.edu
Nelson
Keith
K
Armelles
Gaspar
G
Cebollada
Alfonso
A
Thomay
Tim
T
Leitenstorfer
Alfred
A
Bratschitsch
Rudolf
R