Transit-time oscillations in nanoscale vacuum diode with a pure resistive load
arXiv:2601.20360 · doi:10.1103/cs6r-ftkh
Abstract
We examine the Ramo current in a nanoscale planar vacuum diode undergoing field emission in the presence of a DC voltage supply and an external resistor. We describe a simple mechanism for generating persistent current oscillations in the diode due to the voltage drop across the external resistor (beam loading) which reduces the total field and inhibits the emission. The amplitude and the frequency, which is in the THz domain, depend on the operating parameters of the diode. Molecular dynamics simulations are used to find the characteristics and physical basis of the mechanism, and a simple analytical model is presented, in good agreement with the simulation.
7 pages, 9 figures, 34 references
References in corpus (7)
- Space-charge modulation in vacuum microdiodes at THz frequencies
- Molecular Dynamics Simulations of Field Emission From a Planar Nanodiode
- Molecular Dynamics Simulations of Field Emission From a Prolate Spheroidal Tip
- Space-charge effects in the field-assisted thermionic emission from nonuniform cathodes
- Terahertz pulsed photogenerated current in microdiodes at room temperature
- Dynamics of a Field Emitted Beam from a Microscopic Inhomogeneous Cathode
- Edge effect on the current-temperature characteristic of thermionic cathodes