Quantitative Electron Holographic Analysis of Electric Potential Distribution around FEG-Emitters
نویسندگان
چکیده
By means of electron holography, the electric potential distributions around a cold-type FEG-emitter (field emission gun emitter) are visualized with a change in the applied voltages. In a biased FEG-emitter, the experimental method for obtaining an unperturbed reference wave is applied in order to carry out quantitative electron holographic analyses. Further, through comparing the experimental results obtained by electron holography with those of the simulations taking into account the three dimensional configurations of the FEG-emitter and the anode, it is found that the experimental technique presented in this study is quite useful in obtaining the quantitative information regarding the electric field distribution around a biased FEG-emitter. [doi:10.2320/matertrans.MD200719]
منابع مشابه
Numerical Investigation of the Non-Uniformity of the Electric Field Distribution by Injection of Net Electron Charge in TE CO2 Laser
In this report, the distribution and deviation of electric field in the active medium of the TE CO2 laser has been investigated due to the injection of net electron charge beam as a plasma generator. Some parameters of system have been considered, such as density and mean-free-path of injected charge beam. The electric potential and electric field distribution have been simulated by solving the...
متن کاملTowards quantitative electron holographic mapping of the electric field around the tip of a sharp biased metallic needle
around the tip of a sharp biased metallic needle M. Beleggia, 2 T. Kasama, D. J. Larson, T. F. Kelly, R. E. Dunin-Borkowski, and G. Pozzi Center for Electron Nanoscopy, Technical University of Denmark, Kongens Lyngby, Denmark Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany CAMECA Instruments, Inc., Madison, WI, USA Ernst Ruska-Centre for Microscopy and Spectroscopy with El...
متن کاملNumerical simulation of the tunneling current and ballistic electron effects in field emission devices
Using a two-dimensional model, we have considered the effects of spatially changing fields and potentials, stochastic electron emission, and ballistic electron motion on the anode current and on the width of the electron beam in field emission displays. We have solved the electrostatic problem using the boundary element method. Our electron emission model evaluates the current density at the ca...
متن کاملEffect of Electric Potential Distribution on Electromechanical Behavior of a Piezoelectrically Sandwiched Micro-Beam
The paper deals with the mechanical behavior of a micro-beam bonded with two piezoelectric layers. The micro-beam is suspended over a fixed substrate and undergoes the both piezoelectric and electrostatic actuation. The piezoelectric layers are poled through the thickness and equipped with surface electrodes. The equation governing the micro-beam deflection under electrostatic pressure is deriv...
متن کاملTowards quantitative electrostatic potential mapping of working semiconductor devices using off-axis electron holography.
Pronounced improvements in the understanding of semiconductor device performance are expected if electrostatic potential distributions can be measured quantitatively and reliably under working conditions with sufficient sensitivity and spatial resolution. Here, we employ off-axis electron holography to characterize an electrically-biased Si p-n junction by measuring its electrostatic potential,...
متن کامل