Broadband optical limiting performance of polymer-wrapped carbon nanotubes in the orange-NIR region

Soluble multi-walled carbon nanotubes (MWNTs) have been obtained by noncovalent modification with poly [2-methoxy,5-(2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV). For the composite MWNT/MEH-PPV, there is π–π interaction between the MEH-PPV and MWNTs in addition to the wrapping of the polymer....

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Bibliographic Details
Published in:	Optics communications 2006-09, Vol.265 (1), p.354-358
Main Authors:	Zang, Leyun, Liu, Chunling, Li, Quanshui, Wang, Zhenwei, Liu, Zhengang, Gong, Qihuang
Format:	Article
Language:	eng
Subjects:	Beam trapping, self-focusing and defocusing self-phase modulation Exact sciences and technology Fundamental areas of phenomenology (including applications) Nonlinear optics Optical parametric oscillators and amplifiers Optics Physics
Online Access:	Get full text
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Summary:	Soluble multi-walled carbon nanotubes (MWNTs) have been obtained by noncovalent modification with poly [2-methoxy,5-(2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV). For the composite MWNT/MEH-PPV, there is π–π interaction between the MEH-PPV and MWNTs in addition to the wrapping of the polymer. The nonlinear optical transmittance was measured using a nanosecond optical parametric oscillator pumped with a Nd:YAG system. Excellent optical limiting performance of the composite MWNT/MEH-PPV was observed both in the visible region of 590–680nm and at the wavelength of 1064nm. By means of time-correlated single-photon counting fluorescence measurement, an explanation based on the nonlinear absorption of MWNT dominated by the intermolecular energy transfer was proposed.
ISSN:	0030-4018 1873-0310