Optoelectronic modulation by multi-wall carbon nanotubes
Optoelectronic modulation by multi-wall carbon nanotubes
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DOI：
10.1088/0957-4484/24/4/045201
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发表时间：
2013-02-01
期刊：
影响因子：
3.5
通讯作者：
Terrones, M.
中科院分区：
文献类型：
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作者：
Torres-Torres, C.;Perea-Lopez, N.;Terrones, M.
我们报道了多壁碳纳米管的光传导和强非线性光吸收响应的观察。采用气溶胶热解法制备样品。通过测量1064nm波长下7ns脉冲的透光率，我们确定了双光子吸收效应是三阶非线性的主要机制。在445 nm波长的光导实验似乎证实了在多壁碳纳米管中产生非共振多光子吸收过程的可能性。通过对纳米管电导率的光学控制，我们实现了一种具有锐选择功能的光电调幅装置。
We report the observation of photoconduction and a strong nonlinear optical absorptive response exhibited by multi-wall carbon nanotubes. An aerosol pyrolysis method was employed for the preparation of the samples. Measurements of the optical transmittance with 7 ns pulses at 1064 nm wavelength allowed us to identify a two-photon absorption effect as the main mechanism of third-order nonlinearity. Photoconductive experiments at 445 nm wavelength seem to confirm the possibility for generating non-resonant multi-photonic absorption processes in the multi-wall carbon nanotubes. By the optical control of the conductivity in the nanotubes, we implement an optoelectronic amplitude modulator device with potential applications for sharp selective functionalities.