Using a combination of photoemission electron microscopy and numerical simulations, we investigated the angular moment transfer in strongly enhanced optical near-fields of artificially fabricated optical antennas. The polarization dependence of the optical near-field enhancement has been measured in a maximum symmetric geometry, i.e., excitation by a normal incident planar wave. Finite-difference time-domain simulations for the realistic antenna geometries as determined by high-resolution electron microscopy reveal a very good agreement with experimental data. The agreement confirms that the geometrical asymmetries and inhomogeneities due to the nanoscale fabrication process preserve the circular polarization in the gap regions with strong near-field enhancement.
%0 Journal Article
%1 klaer2015robustness
%A Klaer, Peter
%A Razinskas, Gary
%A Lehr, Martin
%A Krewer, Keno
%A Schertz, Florian
%A Wu, Xiao-Fei
%A Hecht, Bert
%A Schönhense, Gerd
%A Elmers, Hans Joachim
%D 2015
%J Appl. Phys. Lett.
%K antenna experiment nano-optics near-field plasmon resonance simulations
%N 26
%P 261101
%R 10.1063/1.4923242
%T Robustness of plasmonic angular momentum confinement in cross resonant optical antennas
%V 106
%X Using a combination of photoemission electron microscopy and numerical simulations, we investigated the angular moment transfer in strongly enhanced optical near-fields of artificially fabricated optical antennas. The polarization dependence of the optical near-field enhancement has been measured in a maximum symmetric geometry, i.e., excitation by a normal incident planar wave. Finite-difference time-domain simulations for the realistic antenna geometries as determined by high-resolution electron microscopy reveal a very good agreement with experimental data. The agreement confirms that the geometrical asymmetries and inhomogeneities due to the nanoscale fabrication process preserve the circular polarization in the gap regions with strong near-field enhancement.
@article{klaer2015robustness,
abstract = {Using a combination of photoemission electron microscopy and numerical simulations, we investigated the angular moment transfer in strongly enhanced optical near-fields of artificially fabricated optical antennas. The polarization dependence of the optical near-field enhancement has been measured in a maximum symmetric geometry, i.e., excitation by a normal incident planar wave. Finite-difference time-domain simulations for the realistic antenna geometries as determined by high-resolution electron microscopy reveal a very good agreement with experimental data. The agreement confirms that the geometrical asymmetries and inhomogeneities due to the nanoscale fabrication process preserve the circular polarization in the gap regions with strong near-field enhancement.},
added-at = {2020-02-24T09:58:29.000+0100},
author = {Klaer, Peter and Razinskas, Gary and Lehr, Martin and Krewer, Keno and Schertz, Florian and Wu, Xiao-Fei and Hecht, Bert and Schönhense, Gerd and Elmers, Hans Joachim},
biburl = {https://www.bibsonomy.org/bibtex/20026dc31c2930051c29566d0a2c10013/ep5optics},
day = 29,
doi = {10.1063/1.4923242},
file = {Klaer et al. - 2015 - Robustness of plasmonic angular momentum confineme.pdf:C\:\\Users\\scherzad\\Zotero\\storage\\WVP4L6PE\\Klaer et al. - 2015 - Robustness of plasmonic angular momentum confineme.pdf:application/pdf;Snapshot:C\:\\Users\\scherzad\\Zotero\\storage\\J57IBQZA\\1.html:text/html},
interhash = {a639df3a607dad3b6a29f336c4b4f549},
intrahash = {0026dc31c2930051c29566d0a2c10013},
issn = {0003-6951},
journal = {Appl. Phys. Lett.},
keywords = {antenna experiment nano-optics near-field plasmon resonance simulations},
month = {06},
number = 26,
pages = 261101,
timestamp = {2020-02-24T09:58:29.000+0100},
title = {Robustness of plasmonic angular momentum confinement in cross resonant optical antennas},
urldate = {2020-02-24},
volume = 106,
year = 2015
}