Terahertz detection mechanism and contact capacitance of individual metallic single-walled carbon nanotubes
| Autor: | Daniel F. Santavicca, Daniel E. Prober, Christopher B. McKitterick, Philip Kim, Joel Chudow |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Nanotube
Physics and Astronomy (miscellaneous) Terahertz radiation FOS: Physical sciences 02 engineering and technology Carbon nanotube 01 natural sciences Capacitance law.invention law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010302 applied physics Physics Condensed Matter - Mesoscale and Nanoscale Physics business.industry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Electrical contacts 3. Good health Nonlinear system Capacitor Optoelectronics Current (fluid) 0210 nano-technology business |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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