An ultrafast carbon nanotube terahertz polarisation modulator
An ultrafast carbon nanotube terahertz polarisation modulator
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DOI：
10.1063/1.4879895
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发表时间：
2014-05-28
影响因子：
3.2
通讯作者：
Johnston, Michael B.
中科院分区：
文献类型：
--
作者：
Docherty, Callum J.;Stranks, Samuel D.;Johnston, Michael B.
我们展示了非定向光泵浦单壁碳纳米管对太赫兹辐射的超快调制。超快光泵浦脉冲的光激发在平行于光泵浦的纳米线中诱导出瞬时太赫兹吸收。通过控制光泵的偏振，我们证明了太赫兹的偏振和调制是可以调谐的，允许太赫兹辐射的亚皮秒调制。这样的速度暗示了半导体纳米线器件在太赫兹通信技术中的潜力。(C)2014 AIP出版有限责任公司。
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. (C) 2014 AIP Publishing LLC.