Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Feichtner, Thorsten"'
Autor:
Tsarapkin, Aleksei, Zurak, Luka, Maćkosz, Krzysztof, Utke, Ivo, Feichtner, Thorsten, Höflich, Katja
Plasmonic double helical antennas are a means to funnel circularly polarized states of light down to the nanoscale. Here, an existing design tool for single helices is extended to the case of double helices and used to design antennas that combine la
Externí odkaz:
http://arxiv.org/abs/2407.14927
Autor:
Kuen, Lilli, Löffler, Lorenz, Tsarapkin, Aleksei, Zschiedrich, Lin, Feichtner, Thorsten, Burger, Sven, Höflich, Katja
Publikováno v:
Appl. Phys. Lett. 124, 231102 (2024)
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
Externí odkaz:
http://arxiv.org/abs/2402.00664
Autor:
Sweedan, Amro, Pavan, Mariela J., Schatz, Enno, Maaß, Henriette, Tsega, Ashageru, Tzin, Vered, Höflich, Katja, Mörk, Paul, Feichtner, Thorsten, Bashouti, Muhammad Y.
Publikováno v:
Small (2024), 20, 2311937
Achieving reliable and quantifiable performance in large-area surface-enhanced Raman spectroscopy (SERS) substrates has long been a formidable challenge. It requires substantial signal enhancement while maintaining a reproducible and uniform response
Externí odkaz:
http://arxiv.org/abs/2308.01395
Autor:
Zurak, Luka, Wolff, Christian, Meier, Jessica, Kullock, Rene, Mortensen, N. Asger, Hecht, Bert, Feichtner, Thorsten
Publikováno v:
Science Advances 10, eadn5227 (2024)
Classical electrodynamics describes the optical response of systems using bulk electronic properties and infinitesimally thin boundaries. However, due to the quantum nature of electrons, interfaces have a finite thickness. Non-classical surface effec
Externí odkaz:
http://arxiv.org/abs/2307.01423
Autor:
Meier, Jessica, Zurak, Luka, Locatelli, Andrea, Feichtner, Thorsten, Kullock, René, Hecht, Bert
Publikováno v:
Adv. Optical Mater. (2023), 11, 2300731
Plasmonic dimer antennas create strong field enhancement by squeezing light into a nanoscale gap. These optical hotspots are highly attractive for boosting nonlinear processes, such as harmonic generation, photoelectron emission, and ultrafast electr
Externí odkaz:
http://arxiv.org/abs/2210.14105
Autor:
Stegmaier, Alexander, Imhof, Stefan, Helbig, Tobias, Hofmann, Tobias, Lee, Ching Hua, Kremer, Mark, Fritzsche, Alexander, Feichtner, Thorsten, Klembt, Sebastian, Höfling, Sven, Boettcher, Igor, Fulga, Ion Cosma, Schmidt, Oliver G., Greiter, Martin, Kiessling, Tobias, Szameit, Alexander, Thomale, Ronny
Publikováno v:
Phys. Rev. Lett. 126, 215302 (2021)
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry $\mathcal{PT}$ and chiral symmetry anti-$\mathcal{PT}$ ($\mathcal{APT}$). The topological structure manifests itself i
Externí odkaz:
http://arxiv.org/abs/2011.14836
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Autor:
Feichtner, Thorsten
Optische Antennen arbeiten ähnlich wie Antennen für Radiowellen und wandeln elektromagnetische Strahlung in elektrische Wechselströme um. Ladungsdichteansammlungen an der Antennen-Oberfläche führen zu starken und lokalisierten Nahfeldern. Da die
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 119, 217401 (2017)
The emission rate of a point dipole can be strongly increased in presence of a well-designed optical antenna. Yet, optical antenna design is largely based on radio-frequency rules, ignoring e.g.~ohmic losses and non-negligible field penetration in me
Externí odkaz:
http://arxiv.org/abs/1611.05399