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.
Original language | English |
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Article number | 6018323 |
Pages (from-to) | 2726-2732 |
Number of pages | 7 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 59 |
Issue number | 10 PART 2 |
DOIs | |
Publication status | Published - 2011 |
Externally published | Yes |
Keywords
- Carbon nanotubes (CNTs)
- Impedance mismatch
- Microwave rectification
- Schottky diodes