Invited Article: Broadband highly efficient dielectric metadevices for polarization control

• Published in: APL photonics Vol. 1; no. 3; pp. 030801 - 030801-9
• Main Authors: Kruk, Sergey, Hopkins, Ben, Kravchenko, Ivan I., Miroshnichenko, Andrey, Neshev, Dragomir N., Kivshar, Yuri S.
• Format: Journal Article
• Language: English
• Published: United States AIP Publishing 01.06.2016; AIP Publishing LLC
• Subjects: broadband transmission; dielectrics; MATERIALS SCIENCE; nanostructures; polarization; polarizers
• ISSN: 2378-0967; 2378-0967
• DOI: 10.1063/1.4949007

Metadevices based on dielectric nanostructured surfaces with both electric and magnetic Mie-type resonances have resulted in the best efficiency to date for functional flat optics with only one disadvantage: a narrow operational bandwidth. Here we experimentally demonstrate broadband transparent all-dielectric metasurfaces for highly efficient polarization manipulation. We utilize the generalized Huygens principle, with a superposition of the scattering contributions from several electric and magnetic multipolar modes of the constituent meta-atoms, to achieve destructive interference in reflection over a large spectral bandwidth. By employing this novel concept, we demonstrate reflectionless (∼90% transmission) half-wave plates, quarter-wave plates, and vector beam q-plates that can operate across multiple telecom bands with ∼99% polarization conversion efficiency.