Asymmetric devices based on carbon nanotubes as detectors of sub-THz radiation

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Gayduchenko, I.A.^1 ; Fedorov, G.E.^1 ; Stepanova, T.S.^1 ; Titova, N.^1 ; Voronov, B.M.^1 ; But, D.^2 ; Coquillat, D.^2 ; Diakonova, N.^2 ; Knap, W.^2 ; Goltsman, G.N.^1

Moscow State Pedagogical University, Moscow

119991, Russia^1

Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS, Univ. Montpellier, Montpellier, France^2

关键词: Asymmetric carbons;    Asymmetric detectors;    Carbonnanotube network (CNT);    Device configurations;    Quasi-metallic;    Sensing elements;    Sub-terahertz;    Terahertz radiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012143/pdf
DOI  :  10.1088/1742-6596/741/1/012143

来源: IOP

【 摘 要 】

Demand for efficient terahertz (THz) radiation detectors resulted in intensive study of the asymmetric carbon nanostructures as a possible solution for that problem. In this work, we systematically investigate the response of asymmetric carbon nanodevices to sub-terahertz radiation using different sensing elements: from dense carbon nanotube (CNT) network to individual CNT. We conclude that the detectors based on individual CNTs both semiconducting and quasi-metallic demonstrate much stronger response in sub-THz region than detectors based on disordered CNT networks at room temperature. We also demonstrate the possibility of using asymmetric detectors based on CNT for imaging in the THz range at room temperature. Further optimization of the device configuration may result in appearance of novel terahertz radiation detectors.