Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3021016
Keywords
dielectric function; photoelasticity; reflectivity; silver; surface plasmon resonance
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The reflection anisotropy (RA) of Ag(110) has been investigated near 3.9 eV as a function of azimuthal angle theta using a photoelastically modulated spectrometer. At 3.9 eV the RA signal was small and varied as sin 4 theta. At photon energies away from 3.9 eV the signal increased and varied as cos 2 theta. Jones vector modeling of the system showed that in addition to the commonly observed cos 2 theta dependence, which disappears when the reflection is isotropic, there is a sin 4 theta dependence that occurs when the underlying dielectric function is anisotropic; in cubic materials this term is small but for other materials it may be very large.
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