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Sub-femtosecond Electron Transport in Nanoscale Junctions

Event Details:

Wednesday, September 4, 2019
11:00am - 12:00pm PDT


PAB 102/103

Sub-femtosecond Electron Transport in Nanoscale Junctions

Markus Ludwig
Department of Physics
University of Konstanz

We harness phase-locked 4.2-femtosecond single-cycle transients at a pikojoule-level for sub-femtosecond all-optical biasing of a nanoscale tunneling junction embedded into a plasmonic nanocircuit. The resulting tunneling current bursts can be fully controlled by the carrier-envelope phase of the driving field and operate on attosecond time scales in a few-electron regime. By means of optical characteristic curves and interferometric autocorrelations we can probe the underlying ultrafast dynamics. Recently we advanced our studies towards atomic-scale tunneling junctions where electronic transport occurs between two individual gold atoms and thus through a single conduction channel. Such experiments provide access to quantum transport phenomena confined to truly atomic time and length scales.

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