Science of Sintering 2004 Volume 36, Issue 1, Pages: 43-50
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Plasma oscillations in porous samples
The influence of the shape of a sample on the type of uniform dipole collective electrons oscillations is discussed. In samples of a bulk shape uniform bulk dipole oscillations cannot exist. They exist in samples of a thin slab shape only. However in essentially porous materials the electrostatic energy of the oscillation in a sample is considerably larger thus leading to stronger restoring force and higher frequency of the oscillation. When this frequency exceeds the Langmuir frequency, the oscillation becomes of a bulk type. .
Keywords: pores, Langmuir oscillation, Mie oscillation, depolarization factors