Plasmons in nanoscale metal junctions: optical rectification and thermometry

Details Plasmons in nanoscale metal junctions: optical rectification and thermometry Plasmons in nanoscale metal junctions: optical rectification and thermometry

2011-07-06

arxiv.org/abs/1107.1147v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 5 figures, proceedings paper for SPIE Optics+Photonics 2011

Scientific paper

We use simultaneous electronic transport and optical characterization measurements to reveal new information about electronic and optical processes in nanoscale junctions fabricated by electromigration. Comparing electronic tunneling and photocurrents allows us to infer the optical frequency potential difference produced by the plasmon response of the junction. Together with the measured tunneling conductance, we can then determine the locally enhanced electric field within the junction. In similar structures containing molecules, anti-Stokes and Stokes Raman emission allow us to infer the effective local vibrational and electronic temperatures as a function of DC current, examining heating and dissipation on the nanometer scale.

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