Title :
Single Carbon Nanotube Schottky Diode Microwave Rectifiers
Author :
Cobas, Enrique D. ; Anlage, Steven M. ; Fuhrer, Michael S.
Author_Institution :
Dept. of Phys., Univ. of Maryland at Coll. Park, College Park, MD, USA
Abstract :
We report the fabrication of single and few-channel carbon nanotube (CNT) Schottky diodes on high-frequency compatible substrates using horizontally aligned CNT arrays and dissimilar metal contacts in a coplanar-waveguide geometry. Rectification of ac signals in the range of 100 MHz-40 GHz is examined and the observed cutoff frequencies are used to compute the Schottky junction capacitance of the devices, which is strongly CNT-length-dependent and appears dominated by stray capacitance between the CNT channel and metal electrode, in agreement with electrostatic simulations.
Keywords :
Schottky diodes; carbon nanotubes; coplanar waveguides; electrical contacts; microwave diodes; rectifiers; submillimetre wave diodes; AC signal rectification; CNT-length-dependent; Schottky junction capacitance; coplanar-waveguide geometry; electrostatic simulations; frequency 100 MHz to 40 GHz; high-frequency compatible substrates; horizontally aligned CNT arrays; metal contacts; metal electrode; single carbon nanotube Schottky diode microwave rectifiers; stray capacitance; Capacitance; Cutoff frequency; Electrodes; Impedance; Junctions; Nanotubes; Schottky diodes; Carbon nanotubes (CNTs); Schottky diodes; impedance mismatch; microwave rectification;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2164548
