title: Coherent perfect absorption in one-sided reflectionless media.
abstract: In optical experiments one-sided reflectionless (ORL) and coherent perfect absorption (CPA) are unusual scattering properties yet fascinating for their fundamental aspects and for their practical interest. Although these two concepts have so far remained separated from each other, we prove that the two phenomena are indeed strictly connected. We show that a CPA-ORL connection exists between pairs of points lying along lines close to each other in the 3D space-parameters of a realistic lossy atomic photonic crystal. The connection is expected to be a generic feature of wave scattering in non-Hermitian optical media encompassing, as a particular case, wave scattering in parity-time (PT) symmetric media.
authors.affiliation: Center for Quantum Sciences, Northeast Normal University, Changchun 130117, China.
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Wu
authors.affiliation: Department of Engineering and Information Technology &Istituto Nazionale Ottica (INO-CNR), Brescia University, 25133 Brescia, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Artoni
authors.affiliation: Scuola Normale Superiore and CNISM, 56126 Pisa, Italy.
authors.forename: G C
authors.initials: GC
authors.lastname: La Rocca