Terahertz detection mechanism and contact capacitance of individual metallic single-walled carbon nanotubes

Abstract

We characterize the terahertz detection mechanism in antenna-coupled metallic single-walled carbon nanotubes. At low temperature, 4.2 K, a peak in the low-frequency differential resistance is observed at zero bias current due to non-Ohmic contacts. This electrical contact nonlinearity gives rise to the measured terahertz response. By modeling each nanotube contact as a nonlinear resistor in parallel with a capacitor, we determine an upper bound for the value of the contact capacitance that is smaller than previous experimental estimates. The small magnitude of this contact capacitance has favorable implications for the use of carbon nanotubes in high-frequency device applications.

13 pages, 3 figures, 1 table

References in corpus (4)

• Scaling of Resistance and Electron Mean Free Path of Single-Walled Carbon Nanotubes
• Terahertz detection in single wall carbon nanotubes
• Microwave Rectification by a Carbon Nanotube Schottky Diode
• Direct and Heterodyne Detection of Microwaves in a Metallic Single Wall Carbon Nanotube

Cited by in corpus (4)

• Terahertz Science and Technology of Carbon Nanomaterials
• Performance of Graphene Thermal Photon Detectors
• Two-dimensional plasmons in lateral carbon nanotube network structures and their effect on the terahertz radiation detection
• Carbon nanotubes for polarization sensitive terahertz plasmonic interferometry