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Goos-Hänchen effect singularities in transdimensional plasmonic films
Svend-Age Biehs1, Igor V Bondarev2
1Institut für Physik, Carl von Ossietzky Universität, 26111 Oldenburg, Germany.
Nanophotonics (Berlin, Germany)
|December 22, 2025
Summary
We found unique singularities in transdimensional plasmonic systems. These singularities cause large lateral shifts, advancing quantum material development.
Area of Science:
- Condensed matter physics
- Quantum materials
- Plasmonics
Background:
- Topologically protected singularities are crucial in various physical systems.
- Plasmonic systems offer unique electromagnetic properties.
- Understanding nonlocal electromagnetic response is key to novel material properties.
Purpose of the Study:
- To identify and classify singularities in the reflection coefficient of transdimensional plasmonic systems.
- To investigate the origin of these singularities from nonlocal electromagnetic response.
- To quantify the resulting lateral (angular) Goos-Hänchen shifts.
Main Methods:
- Theoretical analysis of transdimensional plasmonic systems.
- Classification of topologically protected singularities.
- Calculation of reflection coefficients and Goos-Hänchen shifts.
Main Results:
- Identification and classification of topologically protected singularities in the reflection coefficient.
- Attribution of singularities to nonlocal electromagnetic response and vertical electron confinement.
- Observation of large lateral (angular) Goos-Hänchen shifts (millimeter/milliradian scale) in the visible range.
Conclusions:
- The observed singularities and large Goos-Hänchen shifts significantly exceed previous reports for artificial metasurfaces.
- These findings present new avenues for the development of advanced quantum materials.
- Transdimensional plasmonic systems are promising platforms for exploring novel physical phenomena.
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