Titlebar

Bibliografische Daten exportieren
Literatur vom gleichen Autor
plus auf ERef Bayreuth
plus bei Google Scholar

 

Imaging and Steering Unidirectional Emission from Nanoantenna Array Metasurfaces

Titelangaben

Lindfors, Klas ; Dregely, Daniel ; Lippitz, Markus ; Engheta, Nader ; Totzeck, Michael ; Giessen, Harald:
Imaging and Steering Unidirectional Emission from Nanoantenna Array Metasurfaces.
In: ACS Photonics. Bd. 3 (16 Januar 2016) Heft 2 . - S. 286-292.
ISSN 2330-4022
DOI: https://doi.org/10.1021/acsphotonics.5b00646

Abstract

In radiofrequency antenna engineering, the array factor made long-distance communication with steerable transmission and receiving possible. At optical frequencies, low-loss signal transmission via free space by using nanoantennas is still in its infancy. Here, we suggest applying the array factor to the optical frequency regime by shaping the radiation pattern of plasmonic metasurfaces featuring nanoantenna arrays. We arrange dipolar gold nanoantennas operating at 785 nm wavelength in wavelength-sized arrays and control the phase that drives the antenna elements. We obtain collimated and unidirectional radiation from this metasurface upon illumination with circularly polarized light, which is not prone to major losses as in common plasmonic waveguide structures. We furthermore demonstrate switching the unidirectional emission to opposite directions with additional beamsteering by modifying the array factor. Our experiment corroborates the evidence for spin–orbit coupling between the helicity of light and suitably designed plasmonic metasurfaces, which can exhibit the spin-Hall effect for light.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Optical nanoantenna; array factor; metasurface; luminescent imaging; beam steering
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik III - Nanooptik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik III - Nanooptik > Lehrstuhl Experimentalphysik III - Nanooptik - Univ.-Prof. Dr. Markus Lippitz
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 29 Jan 2016 09:33
Letzte Änderung: 12 Sep 2016 09:33
URI: https://eref.uni-bayreuth.de/id/eprint/30097