2017/03/17 by Vassos Achilleos, V. Achilleos, Yves Aurégan +3
Physics and Astronomy · #Computer science #Physics #Quantum Mechanics and Non-Hermitian Physics #Quantum chaos and dynamical systems #physics.optics
paper · pdf · doi:10.1103/physrevlett.119.243904
published as Phys. Rev. Lett. 119, 243904 (2017)
arxiv created 2017/03/17 · openalex created_date 2017/04/28 · openalex publication_date 2017/12/15 · arxiv updated 2017/12/20 · openalex updated_date 2026/08/06
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.