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An ultrafast carbon nanotube terahertz polarisation modulator

Abstract:
We demonstrate ultrafast modulation of terahertz radiation by unaligned optically pumped single-walled carbon nanotubes. Photoexcitation by an ultrafast optical pump pulse induces transient terahertz absorption in nanowires aligned parallel to the optical pump. By controlling the polarisation of the optical pump, we show that terahertz polarisation and modulation can be tuned, allowing sub-picosecond modulation of terahertz radiation. Such speeds suggest potential for semiconductor nanowire devices in terahertz communication technologies.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1063/1.4879895

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
Role:
Author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
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Engineering and Physical Sciences Research Council More from this funder
Publisher:
American Institute of Physics Publisher's website
Journal:
Journal of Applied Physics Journal website
Volume:
115
Issue:
20
Pages:
203108-203108
Chapter number:
ARTN 203108
Publication date:
2014-01-01
DOI:
EISSN:
1089-7550
ISSN:
0021-8979
URN:
uuid:72c1fb28-880e-48ec-8e7a-2c8964437f43
Source identifiers:
472096
Local pid:
pubs:472096

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