2021   01   en   p.08-11 Sh.Sh. Amirov,
Four wave interaction in the constant intensity approximation


Parametrical interaction of waves with four frequencies in nondissipative negative index materials is studied by employment the constant intensity approximation, taking into account the reverse reaction of excited waves onto the exciting ones. An expression for complex amplitude as well as the efficiency of conversion to signal wave at the frequency ω1 in arbitrary phase detuning is obtained. It is shown that in contrast to the constant field approximation both amplitude and conversion efficiency are the functions of intensities of forward pump waves as well as the weak wave at frequency ω2 in the constant intensity approximation. It is shown that maxima or minima of the conversion efficiency displace with alteration of weak wave intensity. Analytical expression for the optimum value of phase mismatch at which reflective index reaches its maximum is derived.

Keywords: metamaterials, phase mismatch, for wave mixing, coefficient of reflection, constant intensity approximation.
PACS: 78.67.Pt ; 42.65-k; 42.70-a

Received: 02.01.2021


Faculty of Physics, Baku State University, 23 Z. Khalilov str., Az-1148, Baku, Azerbaijan
Department of Medical and Biological Physics, Azerbaijan Medical University 167 S.Vurgun str., Az-1022, Baku, Azerbaijan
E-mail: phys_med@mail.ru

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