Terahertz photodetector based on double-walled carbon nanotube macrobundle-metal contacts.
Opt Express
; 23(10): 13348-57, 2015 May 18.
Article
em En
| MEDLINE
| ID: mdl-26074584
ABSTRACT
We report on the characterization of a terahertz (THz) photodetector with an extremely simple structure consisting of only a macroscopic bundle of double-walled carbon nanotubes (DWCNTs) suspended between two metal electrodes. Polarization-sensitive, broadband, and significant photoresponse occurring at the DWCNT-metal contacts under THz illumination are observed with room-temperature photocurrent and photovoltage responsivities up to â¼16 mA/W and â¼0.2 V/W at 2.52 THz, respectively. Scanning photocurrent measurements provide evidence that the photothermoelectric mechanism dominates the detector response. The simple geometry and compact nature of our device make it suitable for integration and show promising applications for THz detection.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article