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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Franz D,Kaassamani S,Gauthier D,Nicolas R,Kholodtsova M,Douillard L,Gomes JT,Lavoute L,Gaponov D,Ducros N,Février S,Biegert J,Shi L,Kovacev M,Boutu W,Merdji Hdoi
10.1038/s41598-019-41642-ysubject
Has Abstractpub_date
2019-04-05 00:00:00pages
5663issue
1issn
2045-2322pii
10.1038/s41598-019-41642-yjournal_volume
9pub_type
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