Femtosecond tunneling response of surface plasmon polaritons | Zendy

U. D. Keil | Zendy; Taekjip Ha | Zendy; J.R. Jensen | Zendy; J. M. Hvam | Zendy

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Femtosecond tunneling response of surface plasmon polaritons

Author(s) -

U. D. Keil,

Taekjip Ha,

J.R. Jensen,

J. M. Hvam

Publication year - 1998

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.121545

Subject(s) - femtosecond , scanning tunneling microscope , surface plasmon polariton , optics , picosecond , surface plasmon , quantum tunnelling , materials science , polariton , optoelectronics , total internal reflection , plasmon , laser , physics , nanotechnology

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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