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Attosecond coherent manipulation of electrons in tunneling microscopy

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Science  14 Nov 2019:
eaaz1098
DOI: 10.1126/science.aaz1098

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Abstract

Nanoelectronic devices operating in the quantum regime require coherent manipulation and control over electrons at atomic length and time scales. We demonstrate coherent control over electrons in a tunnel junction of a scanning tunneling microscope, by means of precise tuning of carrier-envelope phase (CEP) of two-cycle long (<6 fs) optical pulses. We explore photon and field-driven tunneling, two different regimes of interaction of optical pulses with the tunnel junction, and demonstrate a transition from one to the other regime. Our results show that it is possible to induce, track and control electronic current at atomic scales with sub-fs resolution, providing a route to develop petahertz coherent nanoelectronics and microscopy.

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