Infrared surface-wave interferometry on W(100).
An IR grating on a clean W(100) surface is shown to generate both homogeneous and inhomogeneous surface electromagnetic waves. An observed interference between these two components, which can be described in terms of a two-beam interferometer with variable arm amplitude and fixed optical path, is used to measure the plasma frequency accurately in the IR.
Hanssen
L M
LM
Riffe
D M
DM
Sievers
A J
AJ