Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.2c05836
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Funding
- EPSRC via the EPSRC Centre for Doctoral Training in Metamaterials [EP/L015331/1]
- ERC [ERC- 2016-AdG-742222]
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In the absence of strong coupling, an anticrossing phenomenon is observed in planar silver/dielectric structures near the epsilon-near-zero point due to impedance matching between the silver and dielectric layers.
Strong light-matter coupling hybridizes light and matter to form states known as polaritons, which give rise to a characteristic anticrossing signature in dispersion plots. Here, we identify conditions under which an anticrossing can occur in the absence of strong coupling. We study planar silver/dielectric structures and find that, around the epsilon-near-zero point in silver, the impedance matching between the silver and dielectric layers gives rise to an anticrossing. Our work shows that care must be taken to ensure that anticrossing arising from impedance matching is not misattributed to strong coupling.
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