Research Article

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2013, 6(10): 752–757

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https://doi.org/10.1007/s12274-013-0353-3

Large-energy-shift photon upconversion in degenerately doped InP nanowires by direct excitation into the electron gas

Kilian Mergenthaler1, Azhar Iqbal2, Jesper Wallentin1, Sebastian Lehmann1, Magnus T. Borgstrm1, Lars Samuelson1, Arkady Yartsev2, and Mats-Erik Pistol1 ()

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1 Solid State Physics/The Nanometer Structure Consortium, Lund University, P. O. Box 118, SE-221 00 Lund, Sweden
2 Division of Chemical Physics, Lund University, P. O. Box 118, SE-221 00 Lund, Sweden

Keywords: KEYWORDS nanowires, photon upconversion, photoluminescence, indium phosphide
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  • Abstract
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ABSTRACT Realizing photon upconversion in nanostructures is important for many nextgeneration applications such as biological labelling, infrared detectors and solar cells. In particular nanowires are attractive for optoelectronics because they can easily be electrically contacted. Here we demonstrate photon upconversion with a large energy shift in highly n-doped InP nanowires. Crucially, the mechanism responsible for the upconversion in our system does not rely on multi-photon absorption via intermediate states, thus eliminating the need for high photon fluxes to achieve upconversion. The demonstrated upconversion paves the way for utilizing nanowires—with their inherent flexibility such as electrica contactability and the ability to position individual nanowires—for photon upconversion devices also at low photon fluxes, possibly down to the single photon level in optimised structures.
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Large-energy-shift photon upconversion in degenerately doped InP nanowires by direct excitation into the electron gas. Nano Res. 2013, 6(10): 752–757 https://doi.org/10.1007/s12274-013-0353-3

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