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

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
Contributor : Caroline Lebe <>
Submitted on : Friday, June 4, 2021 - 2:31:44 PM
Last modification on : Thursday, July 1, 2021 - 4:40:43 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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