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Reflection of terahertz monochromatic surface plasmon-polaritons by a plane mirror

Journal Article · · Quantum Electronics (Woodbury, N.Y.)
DOI:https://doi.org/10.1070/QEL16178· OSTI ID:22724729
Using a free electron laser developed in Novosibirsk, we have studied the reflection of monochromatic ( λ = 130 μm) surface plasmon-polaritons (SPPs) from a plane mirror attached to a waveguiding surface. It is found that 100 % SPP reflection occurs not only in the perpendicular position of the mirror relative to the surface, but also when the mirror is deflected from the normal by the angle α being smaller than the limiting angle α * proportional to the SPP wave vector. When the mirror is deflected by the angle greater than α *, SPPs on a perfectly smooth surface must transform into a bulk wave, while, in the experiment, the SPP reflection coefficient decreases gradually to zero with increasing α , which is a manifestation of dispersion of the wave vector of monochromatic SPPs, caused by their scattering on the inhomogeneities of a real surface. (paper)
OSTI ID:
22724729
Journal Information:
Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 1 Vol. 47; ISSN 1063-7818
Country of Publication:
United States
Language:
English

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