Femtosecond surface plasmon interferometry
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Published on: July 21, 2018
Vasily V Temnov1, Keith Nelson, Gaspar Armelles
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. temnov@mit.edu
Abstract:
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.
