Title
Investigation of hot-electron injection and ballistic transport using ultrathin planar doped barrier launchers in vertical field effect spectrometer structures
Document Type
Article
Publication Date
12-1-1992
Abstract
A study in the optimization of ultrathin planar doped barriers (PDB) for use as hot-electron/ballistic electron launchers in vertical field effect spectrometer structures was conducted. A comparison was made of results for an all-PDB (PDB launcher/PDB analyzer) versus a PDB launcher/graded AlGaAs spectrometer. Previous work involving PDB launchers and vertical field effect structures predicted little to no enhancement of electron current density. This study conclusively refutes these predictions. A new analyzer-up-top design scheme as well as optimization experiments involving varying PDB layer and associated drift region thickness were developed. This work shows previously unobserved hot electron/ballistic spectra for these structures. Moreover, high current densities in excess of 105 A/cm2 were observed for the all-PDB and for the ultra-thin PDB launcher/graded AlGaAs spectrometers under conditions involving both thermionic emission and tunneling.
Publication Source (Journal or Book title)
Journal of Applied Physics
First Page
5735
Last Page
5742
Recommended Citation
Daniels-Race, T., Yamasaki, K., Schaff, W., Tasker, P., & Eastman, L. (1992). Investigation of hot-electron injection and ballistic transport using ultrathin planar doped barrier launchers in vertical field effect spectrometer structures. Journal of Applied Physics, 72 (12), 5735-5742. https://doi.org/10.1063/1.351927