Optical Sensors 2021 2021
DOI: 10.1117/12.2590037
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Nanometer-scale cavities for mid-infrared light based on graphene plasmons

Abstract: Acoustic-graphene-plasmons (AGPs) are highly confined electromagnetic modes, which carry extreme momentum and low loss in the Mid-infrared (MIR) to Terahertz (THz) spectra. They are therefore enablers of extremely strong light-matter interactions at these long wavelengths. However, owing to their large momentum they are also challenging to excite and detect. Here, we demonstrate a new way to excite AGPs that are confined to nanometric-scale cavities directly from the far-field, via localized graphene-plasmon-m… Show more

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Cited by 3 publications
(2 citation statements)
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“…Fortunately, this corresponds to pronounced cavity effects on conduction at the lower band edge. Higher values of γ may be achievable in 2D plasmonic cavities [42].…”
Section: Discussion Of the Resultsmentioning
confidence: 99%
“…Fortunately, this corresponds to pronounced cavity effects on conduction at the lower band edge. Higher values of γ may be achievable in 2D plasmonic cavities [42].…”
Section: Discussion Of the Resultsmentioning
confidence: 99%
“…at arbitrarily large field wave vector q. Our choice of graphene is dictated by recent observations of ultra-confined acoustic graphene plasmons 18,[20][21][22] which spectrum is governed by non-locality, and their potential for photocurrent harvesting 23 . We derive the non-local non-linear conductivity of graphene σ (2)(q,ω) being the proportionality coefficient between photocurrent density and squared ac electric field, j (2) = n q σ (2)(q,ω) E 2 .…”
Section: Introductionmentioning
confidence: 99%