Observation of Electric Field Gradients near Field-Emission Cathode Arrays
The variation of electric field gradient above arrays of field emission cathodes has been investigated using atomic force microscopy. The spatial distribution of electric field gradient was obtained as a function of bias and height. Results show a parabolic relation between the sample bias and electric field gradient. Futhermore, the height dependence of the field gradient is found to follow a power law relationship.
Revised: January 8, 2019 |
Published: February 27, 1995