title: Flexible helices for nonlinear metamaterials.
abstract: The successful fabrication and experimental verification of a novel metamaterial based on flexible metallic helices is reported. The helices undergo compression under the influence of incident radiation, demonstrating a nonlinear chiral electromagnetic response, associated with the power-dependent change in the helix pitch. This design is promising for application to power-dependent polarization rotation of propagating waves.
authors.affiliation: National Research University of Information Technologies, Mechanics, and Optics (ITMO), St. Petersburg 197101, Russia.
authors.forename: Alexey P
authors.initials: AP
authors.lastname: Slobozhanyuk
authors.forename: Mikhail
authors.initials: M
authors.lastname: Lapine
authors.forename: David A
authors.initials: DA
authors.lastname: Powell
authors.forename: Ilya V
authors.initials: IV
authors.lastname: Shadrivov
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.forename: Ross C
authors.initials: RC
authors.lastname: McPhedran
authors.forename: Pavel A
authors.initials: PA
authors.lastname: Belov
keywords: flexible helices; metamaterials; nonlinear chirality