title: Asymmetric transmission of terahertz radiation through a double grating.
abstract: We report on experimental evidence of unidirectional transmission of terahertz waves through a pair of metallic gratings with different periods. The gratings are optimized for a broadband transmission in one direction, accompanied with a high extinction rate in the opposite direction. In contrast to previous studies, we show that the zero-order nonreciprocity cannot be achieved. Nonetheless, we confirm that the structure can be used successfully as an asymmetric filter.
authors.affiliation: Faculty of Physics, University of Warsaw, Warsaw, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Stolarek
authors.forename: Dmitriy
authors.initials: D
authors.lastname: Yavorskiy
authors.forename: Rafał
authors.initials: R
authors.lastname: Kotyński
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Zapata Rodríguez
authors.forename: Jerzy
authors.initials: J
authors.lastname: Łusakowski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Szoplik