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4 October 2023 Topological polaritonic structures based on patterned bulk transition metal dichalcogenide WS2 crystals
Sriram Guddala, Svetlana Kiriushechkina, Yuma Kawaguchi, Anton Vakulenko, Edda Monique Ottilie Proenca Hobuss, Andrea Alù, Alexander B. Khanikaev
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126471K (2023) https://doi.org/10.1117/12.2676948
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
We have designed and experimentally realized a polaritonic topological insulator based on bulk transition metal dichalcogenide crystals (TMDC, ~40nm-thick WS2 film). We have demonstrated that due to their high refractive index and the presence of exciton modes in the optical range, they represent an excellent platform for topological polaritonics, offering both excellent confinement and strong light-matter interactions in a single material. The successful patterning of TMDC into the topological crystal was demonstrated and emergence of the topological polaritonic boundary modes was directly confirmed by the back focal plane imaging and real space imaging techniques.
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Sriram Guddala, Svetlana Kiriushechkina, Yuma Kawaguchi, Anton Vakulenko, Edda Monique Ottilie Proenca Hobuss, Andrea Alù, and Alexander B. Khanikaev "Topological polaritonic structures based on patterned bulk transition metal dichalcogenide WS2 crystals", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126471K (4 October 2023); https://doi.org/10.1117/12.2676948
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KEYWORDS
Transition metals
Crystals
Electron beam lithography
Photonic nanostructures
Quantum imaging
Quantum wells
Resonators
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