Sensitivity Enhancement of Photothermoelectric Terahertz Detectors with Series Combination between Carbon Nanotubes and Metals
| Autor: | Yuki Ochiai, Kou Li, Daichi Suzuki, Yukio Kawano |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Terahertz radiation business.industry Detector chemistry.chemical_element 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology 01 natural sciences law.invention Bismuth 010309 optics Nickel chemistry law Seebeck coefficient 0103 physical sciences Electrode Optoelectronics 0210 nano-technology business Sensitivity (electronics) |
| Zdroj: | 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). |
| DOI: | 10.1109/irmmw-thz.2018.8510320 |
| Popis: | This paper presents highly flexible terahertz (THz) detectors based on single-walled carbon nanotube (SWNT) films. Based on detection mechanism of the photothermoelectric effect, the effective Seebeck coefficient between the SWNT film and the electrode metal is a key parameter for sensitive THz detection. We proposed and demonstrated that the effective Seebeck coefficient was increased by employing the combination with the electrode in series, and achieved raising the sensitivity of THz detection. Particularly utilizing metals (nickel, bismuth) with negative Seebeck coefficient for the series electrode led to the sensitivity enhancement by a factor of 17 times compared to conventional parallel combination. |
| Databáze: | OpenAIRE |
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