Femtosecond tunneling response of surface plasmon polaritons

Ulrich D. Keil; Taekjip Ha; Jacob R. Jensen; Jørn M. Hvam

doi:10.1063/1.121545

Femtosecond tunneling response of surface plasmon polaritons

Ulrich D. Keil, Taekjip Ha, Jacob R. Jensen, Jørn M. Hvam

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10 Scopus citations

Abstract

We obtain femtosecond (200 fs) time resolution using a scanning tunneling microscope on surface plasmon polaritons (SPPs) generated by two 100 fs laser beams in total internal reflection geometry. The tunneling gap dependence of the signal clearly indicates the tunneling origin of the signal and suggests that nanometer spatial resolution can be obtained together with femtosecond temporal resolution. This fast response, in contrast to the picosecond decay time of SPPs revealed by differential reflectivity measurements, can be attributed to a coherent superposition of SPPs rectified at the tunneling junction.

Original language	English (US)
Pages (from-to)	3074-3076
Number of pages	3
Journal	Applied Physics Letters
Volume	72
Issue number	23
DOIs	https://doi.org/10.1063/1.121545
State	Published - 1998
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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T1 - Femtosecond tunneling response of surface plasmon polaritons

AU - Keil, Ulrich D.

AU - Ha, Taekjip

AU - Jensen, Jacob R.

AU - Hvam, Jørn M.

PY - 1998

Y1 - 1998

N2 - We obtain femtosecond (200 fs) time resolution using a scanning tunneling microscope on surface plasmon polaritons (SPPs) generated by two 100 fs laser beams in total internal reflection geometry. The tunneling gap dependence of the signal clearly indicates the tunneling origin of the signal and suggests that nanometer spatial resolution can be obtained together with femtosecond temporal resolution. This fast response, in contrast to the picosecond decay time of SPPs revealed by differential reflectivity measurements, can be attributed to a coherent superposition of SPPs rectified at the tunneling junction.

AB - We obtain femtosecond (200 fs) time resolution using a scanning tunneling microscope on surface plasmon polaritons (SPPs) generated by two 100 fs laser beams in total internal reflection geometry. The tunneling gap dependence of the signal clearly indicates the tunneling origin of the signal and suggests that nanometer spatial resolution can be obtained together with femtosecond temporal resolution. This fast response, in contrast to the picosecond decay time of SPPs revealed by differential reflectivity measurements, can be attributed to a coherent superposition of SPPs rectified at the tunneling junction.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 23

ER -

Femtosecond tunneling response of surface plasmon polaritons

Abstract

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