Title :
Cross-Bar Design of Nano-Vacuum Triode for High-Frequency Applications
Author :
Ulisse, G. ; Brunetti, F. ; Ricci, F. ; Fiorello, A.M. ; Carlo, A.D.
Author_Institution :
Univ. of Rome Tor Vergata, Rome, Italy
Abstract :
In this letter, a new nano-vacuum triode based on carbon nanotubes (CNTs) has been designed. The use of CNTs as emitters with their extremely high aspect ratio and their characteristics to be patterned in specific emitting areas allowed the realization of a cross-bar geometry for which the transconductance is maximized and the grid-cathode capacitance is reduced. This allowed us to achieve a device cutoff frequency of 156 GHz, which is well beyond the state of the art.
Keywords :
carbon nanotubes; millimetre wave tubes; triodes; C; CNT emitter; carbon nanotubes; crossbar geometry design; frequency 156 GHz; grid-cathode capacitance; high-frequency applications; nanovacuum triode; transconductance; Capacitance; Carbon nanotubes; Cathodes; Cutoff frequency; Dielectrics; Nanoscale devices; Transconductance; Nanotubes; nano-vacuum tubes; terahertz frequency;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2012.2202367
