Plasmonic antennas with helical geometry are capable transducers between linearly polarized dipole emission and purely circular polarized far-fields. Besides large Purcell enhancements they possess a wide tunability due to the geometry dependence of their resonant modes. Here, the coupling of a dipole emitter embedded in a thin film to plasmonic single and double helices is numerically studied. Using a higher-order finite element method (FEM) the wavelength dependent Purcell enhancement of a dipole with different positions and orientations is calculated and the far-fields with respect to their chirality and radiation patterns are analyzed. Both single and double helices demonstrate highly directional and circularly polarized far-fields for resonant excitation but with significantly improved directional radiation for the case of double helices.
%0 Generic
%1 kuen2024chiral
%A Kuen, Lilli
%A Löffler, Lorenz
%A Tsarapkin, Aleksei
%A Zschiedrich, Lin
%A Feichtner, Thorsten
%A Burger, Sven
%A Höflich, Katja
%D 2024
%K chiral directional nano-optics near-field optical plasmon
%R 10.48550
%T Chiral and directional optical emission from a dipole source coupled to a helical plasmonic antenna
%U https://browse.arxiv.org/abs/2402.00664
%X Plasmonic antennas with helical geometry are capable transducers between linearly polarized dipole emission and purely circular polarized far-fields. Besides large Purcell enhancements they possess a wide tunability due to the geometry dependence of their resonant modes. Here, the coupling of a dipole emitter embedded in a thin film to plasmonic single and double helices is numerically studied. Using a higher-order finite element method (FEM) the wavelength dependent Purcell enhancement of a dipole with different positions and orientations is calculated and the far-fields with respect to their chirality and radiation patterns are analyzed. Both single and double helices demonstrate highly directional and circularly polarized far-fields for resonant excitation but with significantly improved directional radiation for the case of double helices.
@misc{kuen2024chiral,
abstract = {Plasmonic antennas with helical geometry are capable transducers between linearly polarized dipole emission and purely circular polarized far-fields. Besides large Purcell enhancements they possess a wide tunability due to the geometry dependence of their resonant modes. Here, the coupling of a dipole emitter embedded in a thin film to plasmonic single and double helices is numerically studied. Using a higher-order finite element method (FEM) the wavelength dependent Purcell enhancement of a dipole with different positions and orientations is calculated and the far-fields with respect to their chirality and radiation patterns are analyzed. Both single and double helices demonstrate highly directional and circularly polarized far-fields for resonant excitation but with significantly improved directional radiation for the case of double helices. },
added-at = {2024-02-02T15:16:09.000+0100},
archiveprefix = {arXiv},
author = {Kuen, Lilli and Löffler, Lorenz and Tsarapkin, Aleksei and Zschiedrich, Lin and Feichtner, Thorsten and Burger, Sven and Höflich, Katja},
biburl = {https://www.bibsonomy.org/bibtex/2626168837986d0e7991e6524d5d12ff4/ep5optics},
doi = {10.48550},
eprint = {2402.00664},
interhash = {7391a5fe10c12813437a9dfb71758753},
intrahash = {626168837986d0e7991e6524d5d12ff4},
keywords = {chiral directional nano-optics near-field optical plasmon},
language = {english},
month = {February},
primaryclass = {physics.optics},
timestamp = {2024-02-02T15:16:09.000+0100},
title = {Chiral and directional optical emission from a dipole source coupled to a helical plasmonic antenna},
url = {https://browse.arxiv.org/abs/2402.00664},
year = 2024
}