NSTI Nanotech 2009

Pierced Sensor for Nano-Microscope

R. Sklyar
Independent researcher, UA

Keywords: superconducting field-effect transistor (SuFET), exciting/pickup coil, mutual inductance, magnetic images


For nonzero drain voltages the superconducting field-effect transistor (SuFET) absorbs low- frequency power of the average Josphson current and re-emits this power at extremely high frequencies. The feasibility of the transistor function on a yarn-like structure has been demonstrated. As a result, the decreasing of the SuFET channel’s current is defined by the value of losses for eddy currents I in the tissue. Thus, by monitoring the change in dI as a function of pickup coil position, we make use of the factor M/Li dynamics of the tissue to obtain a micro- or nanowave screening image. To achieve a high spatial resolution, our nano-microscope (NMSC) uses a small ambient temperature pickup coil(s) directly as a magnetic sensor, rather than a SQUID’s pickup loop coupled to a cooled SuFET. Sounding and scanning closer to the tissue improves the spatial resolution, thanks to the complete penetration into the measuring process. Other than the SuFET itself, there are no other microwave components, sources, or detectors. In conclusion, we note that the ability to detect small regions of nonmagnetic conducting materials, gives the magnetic flux NMSC broad capabilities in material analysis.
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