BINKOWSKI, Felix; WU, Tong; LALANNE, Philippe; BURGER, Sven; GOVOROV, Alexander

doi:10.1021/acsphotonics.1c00231

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BINKOWSKI, Felix

WU, Tong

LALANNE, Philippe
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

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ACS photonics. 2021-03-16, vol. 8, n° 4, p. 1243-1250

American Chemical Society

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We theoretically study hot electron generation through the emission of a dipole source coupled to a nanoresonator on a metal surface. In our hybrid approach, we solve the time-harmonic Maxwell's equations numerically and apply a quantum model to predict the efficiency of hot electron generation. Strongly confined electromagnetic fields and the strong enhancement of hot electron generation at the metal surface are predicted and are further interpreted with the theory of quasinormal modes. In the investigated nanoresonator setup, both the emitting source and the acceptor resonator are localized in the same volume, and this configuration looks promising to achieve high efficiencies of hot electron generation. By comparing with the efficiency calculated in the absence of the plasmonic nanoresonator, that is, the dipole source is located near a flat, unstructured metal surface, we show that the effective excitation of the modes of the nanoresonator boosts the generation efficiency of energetic charge carriers. The proposed scheme can be used in tip-based spectroscopies and other optoelectronic applications.< Réduire

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Metrics & More Article Recommendations hot electron generation

localized light source

near-field excitation

plasmonic nanoresonators

Metrics & More Article Recommendations hot electron generation

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Hot Electron Generation through Near-Field Excitation of Plasmonic Nanoresonators

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