4.6 Article

Photon upconversion with hot carriers in plasmonic systems

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APPLIED PHYSICS LETTERS
卷 107, 期 13, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/1.4932127

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  1. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001293]

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We propose a scheme of photon upconversion based on harnessing the energy of plasmonic hot carriers. Low-energy photons excite hot electrons and hot holes in a plasmonic nanoparticle, which are then injected into an adjacent semiconductor quantum well where they radiatively recombine to emit a photon of higher energy. We theoretically study the proposed upconversion scheme using Fermi-liquid theory and determine the internal quantum efficiency of upconversion to be as high as 25% in 5 nm silver nanocubes. This upconversion scheme is linear in its operation, does not require coherent illumination, offers spectral tunability, and is more efficient than conventional upconverters. (C) 2015 AIP Publishing LLC.

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