Spatio-temporal imaging of voltage pulses with an ultrafast scanning tunneling microscope

Jacob Riis Jensen, Ulrich Dieter Felix Keil, Jørn Märcher Hvam

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    Measurements on an ultrafast scanning tunneling microscope with simultaneous spatial and temporal resolution are presented. We show images of picosecond pulses propagating on a coplanar waveguide and resolve their mode structures. The influence of transmission line discontinuities on the mode structure is investigated. It is also demonstrated how common and differential modes of electrical pulses are generated. The capacitive coupling between the tip and the transmission line is explained in terms of two contributions: a long range and a local coupling. We also show how these contributions affect the imaging of the propagating pulses. (C) 1997 American Institute of Physics.
    Original languageEnglish
    JournalApplied Physics Letters
    Issue number20
    Pages (from-to)2762-2764
    Publication statusPublished - 1997

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    Copyright (1997) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.


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