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- W3128253727 abstract "We study the peculiarities of light pulse propagation in the quasi-parity-time (quasi- <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>P</mml:mi> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>T</mml:mi> </mml:mrow> </mml:math> ) symmetric periodic media in the Bragg geometry. Our focus is the investigation of the competition between the Bragg reflection and the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>P</mml:mi> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>T</mml:mi> </mml:mrow> </mml:math> symmetry contribution provided different pulse duration. The mechanisms of nonsymmetric interaction between the counterpropagating waves are revealed and the various regimes of the monochromatic and nonmonochromatic wave propagation are determined. It is demonstrated that regardless the gain and loss level, the propagation of so-called long pulses in a quasi- <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>P</mml:mi> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>T</mml:mi> </mml:mrow> </mml:math> -symmetric medium is analogous to monochromatic waves propagation in a “pure” <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>P</mml:mi> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi class=MJX-tex-caligraphic mathvariant=script>T</mml:mi> </mml:mrow> </mml:math> -symmetric medium. At the same time, the transmittance of the short pulses is accompanied by strong distortions determined by the gain and loss level." @default.
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- W3128253727 date "2021-02-25" @default.
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- W3128253727 title "Peculiarities of light pulse propagation in quasi-<i>P</i><i>T</i> symmetric periodic structures" @default.
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