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Generation of the second harmonic of an electromagnetic wave in resonant plasma layers

Journal Article · · Radiophys. Quantum Electron. (Engl. Transl.); (United States)
OSTI ID:6191507
The generation of the second harmonic (SHG) of an electromagnetic TM wave in a thin parabolic layer of cold plasma under the condition that the region of the plasma resonance at the fundamental or doubled frequency is close to the top of the layer is studied. It is shown that the strongest SHG occurs at resonance at the fundamental frequency. In this case, if collisions are quite weak, the efficiency of SHG at the extremum of the plasma density is much higher than that of SHG in monotonic (both smooth and sharp) plasma layers. For resonance at the doubled frequency the maximum amplitude of the second harmonic is of the same order of magnitude as in the sharply nonuniform monotonic layers.
OSTI ID:
6191507
Journal Information:
Radiophys. Quantum Electron. (Engl. Transl.); (United States), Journal Name: Radiophys. Quantum Electron. (Engl. Transl.); (United States) Vol. 30:7; ISSN RPQEA
Country of Publication:
United States
Language:
English