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5 October 2023 Nano-photoluminescence and Raman imaging of TMD moire domains and excitons strongly coupled to nanocavities
P. James Schuck, Tom Darlington
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Proceedings Volume PC12654, Enhanced Spectroscopies and Nanoimaging 2023; PC126540O (2023) https://doi.org/10.1117/12.2682184
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Here, we show nano-Raman and nano-photoluminescence imaging of moire lattices in twisted TMD bilayers. The results show a strong optical intensity in the Raman and PL signals from the moiré domain walls. Comparing with AFM imaging, our results show exact agreement of with boundaries of the moiré cells. Further, nano-Raman spectroscopy of the domain walls provides a direct optical measure of the relative strain. In related work, we investigate strong coupling between TMD excitons and a tunable plasmonic nanocavity formed between a plasmonic tip and gold substrate. We demonstrate the ability to continuously tune between weak and strong coupling conditions where both upper and lower polariton bands are observed.
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P. James Schuck and Tom Darlington "Nano-photoluminescence and Raman imaging of TMD moire domains and excitons strongly coupled to nanocavities", Proc. SPIE PC12654, Enhanced Spectroscopies and Nanoimaging 2023, PC126540O (5 October 2023); https://doi.org/10.1117/12.2682184
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KEYWORDS
Excitons
Moire patterns
Raman spectroscopy
Quantum plasmonics
Quantum systems
Scanning tunneling microscopy
Spectroscopy
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