250 nm & 400 nm
Our high resolution SHPM sensors are made by e-beam lithography from a GaAs/AlGaAs heterostructure, based on a high mobility two-dimensional electron gas (2DEG). This is the ideal material choice for low temperature measurements. The Hall cross comes in two different sizes (250 nm or 400 nm), and sits at the corner of a small 3 mm x 3 mm chip. For finding the surface of a conductive specimen during autoapproach, the sensor includes two sharp corners at the very edge of the sensor corner. With a slightly tilted sensor plane (~1.5°), this corner is the closest point to the sample surface, and hence, the conductive corners can serve a simple STM tips. In order to populate the 2DEG with charge carriers, it needs to be illuminated with infrared light for about 30s. For more detailed information on our SHPM sensors, please contact us.
|Ultra-high resolution Hall probe sensor for SHPM 250 nm||1004171|
|High resolution Hall probe sensor for SHPM 400 nm||1005547|