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All semiconductor enhanced high-harmonic generation from a single nanostructured cone

Dominik Franz 1 Shatha Kaassamani 1 David Gauthier 1 Rana Nicolas 1 Maria Kholodtsova 1 Ludovic Douillard 2 Jean-Thomas Gomes 3 Laure Lavoute 3 Dmitry Gaponov 3 Nicolas Ducros 3 Sébastien Février 3, 4 Jens Biegert 5, 3 Liping Shi 6 Milutin Kovacev 6 Willem Boutu 1 Hamed Merdji 1 
1 ATTO - Attophysique
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
2 LEPO - Laboratoire d'Electronique et nanoPhotonique Organique
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
Abstract : The enhancement and control of non-linear phenomena at a nanometer scale has a wide range of applications in science and in industry. Among these phenomena, high-harmonic generation in solids is a recent focus of research to realize next generation petahertz optoelectronic devices or compact all solid-state EUV sources. Here, we report on the realization of the first nanoscale high harmonic source. The strong field regime is reached by confining the electric field from a few nanojoules femtosecond laser in a single 3D semiconductor waveguide. We reveal a strong competition between enhancement of coherent harmonics and incoherent fluorescence favored by excitonic processes. However, far from the band edge, clear enhancement of the harmonic emission is reported with a robust sustainability offering a compact nanosource for applications. We illustrate the potential of our harmonic nano-device by performing a coherent diffractive imaging experiment. Ultra-compact UV/X-ray nanoprobes are foreseen to have other applications such as petahertz electronics, nano-tomography or nano-medicine.
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https://hal-cea.archives-ouvertes.fr/cea-02096268
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Submitted on : Friday, June 4, 2021 - 2:31:44 PM
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Dominik Franz, Shatha Kaassamani, David Gauthier, Rana Nicolas, Maria Kholodtsova, et al.. All semiconductor enhanced high-harmonic generation from a single nanostructured cone. Scientific Reports, Nature Publishing Group, 2019, 9 (1), pp.5663. ⟨10.1038/s41598-019-41642-y⟩. ⟨cea-02096268⟩

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