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Parametric Decay of a High‐Power Helicon Wave in to a Transverse Acoustic and Another Helicon Waves in Longitudinally Magnetised Cubic Piezoelectric Semiconducting Plasmas
Author(s) -
Ghosh S.,
Dixit S.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221240143
Subject(s) - helicon , piezoelectricity , physics , dispersion relation , plasma , atomic physics , crystal (programming language) , semiconductor , computational physics , condensed matter physics , optics , materials science , acoustics , optoelectronics , nuclear physics , computer science , programming language
A detailed analytical investigation is made of the parametric decay of a high‐power helicon into another helicon and an acoustic wave in a longitudinally magnetised n‐type cubic piezoelectric semiconducting crystal belonging to the class 4 3m. The dispersion relation is obtained by using a hydrodynamic model of an homogeneous, piezoelectric,one‐component (electron) semiconducting plasma, and the threshold value of pump electric field and the growth rate of unstable mode well above the threshold are discussed. The analysis is applied to a specific semiconductor, n‐InSb at 77 K duly irradiated by a high‐power heliconwave for numerical estimation. The laser wave intensities used are in the range of 10 9 to 10 12 Wm −2 which is assumed to be less than the damage threshold of the InSb crystal. The order of waveamplitude is feasible presently. The growth rate is found to be of the order of 10 10 s −1 .