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 frst nanoscale high harmonic source. The strong feld regime is reached by confning the electric feld from a few nanojoules femtosecond laser in a single 3D semiconductor waveguide. We reveal a strong competition between enhancement of coherent harmonics and incoherent fuorescence favored by excitonic processes. However, far from the band edge, clear enhancement of the harmonic emission is reported with a robust sustainability ofering a compact nanosource for applications. We illustrate the potential of our harmonic nano-device by performing a coherent difractive 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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Submitted on : Thursday, April 11, 2019 - 11:18:30 AM
Last modification on : Thursday, April 25, 2019 - 1:21:41 AM

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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), ⟨10.1038/s41598-019-41642-y⟩. ⟨cea-02096268⟩



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