Dresden 2006 – scientific programme
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TT: Tiefe Temperaturen
TT 7: Superconductivity & Solids At Low Temperature - Poster Session
TT 7.53: Poster
Monday, March 27, 2006, 14:00–17:45, P1
Microwave power distribution in the near-field regime of a 98 GHz source — •Felix Stewing, Andre Kaestner, and Meinhard Schilling — Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik, TU Braunschweig, Hans-Sommer-Straße 66, 38106 Braunschweig
A new method for measuring microwave near-field radiation is presented. We use a scanning microscope equipped with a high-TC Josephson-cantilever of LaAlO3 to measure near-field power distributions in three dimensions with 100 nm spatial resolution. The height approach is piezo-controlled with a resolution of a few micrometers in z-direction (perpendicular to the surface).
First results are presented for high-frequency properties and possible spatial resolution of the Josephson cantilevers. The influence of the dielectric material LaAlO3 on the measured microwave radiation pattern from a source of 98 GHz is investigated. The calculated and measured electromagnetic power distributions are compared.