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

Volume

59

Issue

10

fYear

2011

Firstpage

2726

Lastpage

2732

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;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2011.2164548

Filename

6018323