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Enhanced Goos–Hänchen shift at normal incidence using Tamm plasmon polaritons.

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Title: Enhanced Goos–Hänchen shift at normal incidence using Tamm plasmon polaritons.
Authors: Zhang, Shi-Yi1 (AUTHOR), Ding, Yan-Jing1 (AUTHOR), Geng, Zi-Ru1 (AUTHOR), Wu, Li-Ting2 (AUTHOR), Guo, Tian-Jing3 (AUTHOR), Kang, Ming4 (AUTHOR), Chen, Jing1 (AUTHOR) jchen4@nankai.edu.cn
Source: Journal of Physics D: Applied Physics. 2026, Vol. 59 Issue 17, p1-12. 12p.
Subjects: Polaritons, Magnetooptics, T-symmetry, Integrated optics
Abstract: The Goos–Hänchen (GH) shift, a lateral displacement of an optical beam under total internal reflection, generally requires oblique incidence and remains reciprocal. Achieving a non-reciprocal GH shift at normal incidence via the magneto-optical effect is of great importance for ultra-compact integrated photonic systems, yet its typically weak magnitude has hindered practical implementation. Here, we propose a novel strategy that exploits the strong field localization of Tamm plasmon polaritons in a simple multilayer structure, enabling orders-of-magnitude enhancement of the non-reciprocal GH shift in both reflection and transmission at normal incidence. Furthermore, by incorporating parity-time symmetry, we demonstrate that this enhancement can be further increased. Our work establishes a compact and versatile platform for realizing pronounced non-reciprocal beam shifts, opening promising pathways toward on-chip photonic devices such as isolators, switchers, and sensors. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:The Goos–Hänchen (GH) shift, a lateral displacement of an optical beam under total internal reflection, generally requires oblique incidence and remains reciprocal. Achieving a non-reciprocal GH shift at normal incidence via the magneto-optical effect is of great importance for ultra-compact integrated photonic systems, yet its typically weak magnitude has hindered practical implementation. Here, we propose a novel strategy that exploits the strong field localization of Tamm plasmon polaritons in a simple multilayer structure, enabling orders-of-magnitude enhancement of the non-reciprocal GH shift in both reflection and transmission at normal incidence. Furthermore, by incorporating parity-time symmetry, we demonstrate that this enhancement can be further increased. Our work establishes a compact and versatile platform for realizing pronounced non-reciprocal beam shifts, opening promising pathways toward on-chip photonic devices such as isolators, switchers, and sensors. [ABSTRACT FROM AUTHOR]
ISSN:00223727
DOI:10.1088/1361-6463/ae6126