We consider the carrier transport and plasmonic phenomena in the lateral carbon nanotube (CNT) networks forming the device channel with asymmetric electrodes. One electrode is the Ohmic contact to the CNT network and the other contact is the Schottky contact. These structures can serve as detectors of the terahertz (THz) radiation. We develop the device model for collective response of the lateral CNT networks which comprise a mixture of randomly oriented semiconductor CNTs (s-CNTs) and quasi-metal CNTs (m-CNTs). The proposed model includes the concept of the collective two-dimensional (2D) plasmons in relatively dense networks of randomly oriented CNTs (CNT “felt”) and predicts the detector responsivity spectral characteristics exhibiting sharp resonant peaks at the signal frequencies corresponding to the 2D plasmonic resonances. The detection mechanism is the rectification of the ac current due the nonlinearity of the Schottky contact current-voltage characteristics under the conditions of a strong enhancement of the potential drop at this contact associated with the plasmon excitation. The detector responsivity depends on the fractions of the s- and m-CNTs. The burning of the near-contact regions of the m-CNTs or destruction of these CNTs leads to a marked increase in the responsivity in agreement with our experimental data. The resonant THz detectors with sufficiently dense lateral CNT networks can compete and surpass other THz detectors using plasmonic effects at room temperatures.
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28 July 2016
Research Article|
July 22 2016
Two-dimensional plasmons in lateral carbon nanotube network structures and their effect on the terahertz radiation detection
V. Ryzhii;
V. Ryzhii
1Research Institute of Electrical Communication,
Tohoku University
, Sendai 980-8577, Japan
2
Institute of Ultra High Frequency Semiconductor Electronics of RAS
, Moscow 117105, Russia
3Center for Photonics and Infrared Engineering,
Bauman Moscow State Technical University
, Moscow 111005, Russia
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T. Otsuji;
T. Otsuji
1Research Institute of Electrical Communication,
Tohoku University
, Sendai 980-8577, Japan
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M. Ryzhii;
M. Ryzhii
4Department of Computer Science and Engineering,
University of Aizu
, Aizu-Wakamatsu 965-8580, Japan
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V. G. Leiman;
V. G. Leiman
5Department of General Physics,
Moscow Institute of Physics and Technology
, Dolgoprudny, 147100, Russia
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G. Fedorov;
G. Fedorov
5Department of General Physics,
Moscow Institute of Physics and Technology
, Dolgoprudny, 147100, Russia
6Physics Department,
Moscow State Pedagogical University
, Moscow 119991, Russia
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G. N. Goltzman;
G. N. Goltzman
6Physics Department,
Moscow State Pedagogical University
, Moscow 119991, Russia
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I. A. Gayduchenko;
I. A. Gayduchenko
6Physics Department,
Moscow State Pedagogical University
, Moscow 119991, Russia
7
National Research Center “Kurchatov Institute
,” Moscow 123182, Russia
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N. Titova
;
N. Titova
6Physics Department,
Moscow State Pedagogical University
, Moscow 119991, Russia
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D. Coquillat;
D. Coquillat
8Laboratoire Charles Coulomb UMR 5221,
Universite Montpellier 2 and CNRS
, F-34095, Montpellier, France
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D. But;
D. But
8Laboratoire Charles Coulomb UMR 5221,
Universite Montpellier 2 and CNRS
, F-34095, Montpellier, France
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W. Knap;
W. Knap
8Laboratoire Charles Coulomb UMR 5221,
Universite Montpellier 2 and CNRS
, F-34095, Montpellier, France
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V. Mitin;
V. Mitin
9Department of Electrical Engineering,
University at Buffalo
, Buffalo, New York 1460-1920, USA
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M. S. Shur
M. S. Shur
10Departments of Electrical, Computer, and Systems Engineering and Physics, Applied Physics, and Astronomy,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
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J. Appl. Phys. 120, 044501 (2016)
Article history
Received:
February 17 2016
Accepted:
July 09 2016
Citation
V. Ryzhii, T. Otsuji, M. Ryzhii, V. G. Leiman, G. Fedorov, G. N. Goltzman, I. A. Gayduchenko, N. Titova, D. Coquillat, D. But, W. Knap, V. Mitin, M. S. Shur; Two-dimensional plasmons in lateral carbon nanotube network structures and their effect on the terahertz radiation detection. J. Appl. Phys. 28 July 2016; 120 (4): 044501. https://doi.org/10.1063/1.4959215
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