Plasmonic antennas with helical geometry can convert linearly polarized dipole radiation into purely circularly polarized far-fields, and vice versa. 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.
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3 June 2024
Research Article|
June 03 2024
Chiral and directional optical emission from a dipole source coupled to a helical plasmonic antenna
Special Collection:
Topological and Chiral Matter – Physics and Applications
Lilli Kuen
;
Lilli Kuen
a)
(Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Zuse Institute Berlin
, Takustraße 7, 14195 Berlin, Germany
2
JCMwave GmbH
, Bolivarallee 22, 14050 Berlin, Germany
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; [email protected]; and [email protected]
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Lorenz Löffler
;
Lorenz Löffler
(Investigation, Methodology, Writing – review & editing)
3
Experimental Physics 5, Institute of Physics, University of Würzburg
, Würzburg, Germany
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Aleksei Tsarapkin
;
Aleksei Tsarapkin
(Investigation, Methodology, Writing – review & editing)
4
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
, 12489 Berlin, Germany
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Lin Zschiedrich
;
Lin Zschiedrich
(Investigation, Methodology, Writing – review & editing)
2
JCMwave GmbH
, Bolivarallee 22, 14050 Berlin, Germany
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Thorsten Feichtner
;
Thorsten Feichtner
a)
(Investigation, Methodology, Writing – review & editing)
3
Experimental Physics 5, Institute of Physics, University of Würzburg
, Würzburg, Germany
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; [email protected]; and [email protected]
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Sven Burger
;
Sven Burger
a)
(Investigation, Methodology, Writing – review & editing)
1
Zuse Institute Berlin
, Takustraße 7, 14195 Berlin, Germany
2
JCMwave GmbH
, Bolivarallee 22, 14050 Berlin, Germany
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; [email protected]; and [email protected]
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Katja Höflich
Katja Höflich
a)
(Investigation, Methodology, Writing – original draft, Writing – review & editing)
4
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
, 12489 Berlin, Germany
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; [email protected]; and [email protected]
Search for other works by this author on:
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; [email protected]; and [email protected]
Appl. Phys. Lett. 124, 231102 (2024)
Article history
Received:
January 31 2024
Accepted:
May 18 2024
Citation
Lilli Kuen, Lorenz Löffler, Aleksei Tsarapkin, Lin Zschiedrich, Thorsten Feichtner, Sven Burger, Katja Höflich; Chiral and directional optical emission from a dipole source coupled to a helical plasmonic antenna. Appl. Phys. Lett. 3 June 2024; 124 (23): 231102. https://doi.org/10.1063/5.0201748
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