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Article Dans Une Revue Physical Review Letters Année : 2017

Scattering by Finite Periodic P T -Symmetric Structures

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In this work, we study the transmission properties of one-dimensional finite periodic systems with PT symmetry. A simple closed-form expression is obtained for the total transmittance from a lattice of N cells, that allows us to describe the transmission minima (maxima) when the system is in the PT-unbroken (broken) phase. Utilizing this expression, we provide the necessary conditions, independent of the number of cells, for the occurrence of a coherent perfect absorber and laser for any finite PT-symmetric periodic potential. Under these conditions, we provide a recipe for building finite periodic structures with near perfect absorption and extremely large amplification.
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hal-01937209 , version 1 (04-12-2018)



V. Achilleos, Yves Aurégan, V. Pagneux. Scattering by Finite Periodic P T -Symmetric Structures. Physical Review Letters, 2017, 119 (24), pp.243904. ⟨10.1103/physrevlett.119.243904⟩. ⟨hal-01937209⟩
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