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http://dx.doi.org/10.3807/KJOP.2004.15.5.449

Optical Limiting Properties of Multi-Walled Carbon Nanotube Suspensions  

Yu Hyojung (Department of Physics, University of Ulsan)
Kim Sok Won (Department of Physics, University of Ulsan)
Publication Information
Korean Journal of Optics and Photonics / v.15, no.5, 2004 , pp. 449-454 More about this Journal
Abstract
The optical limiter is an optical component which reduces laser beam intensity for the protection of eyes and light sensors. Carbon nanotube is now known as a highly efficient optical limiting material. Optical limiting effect of the multi-walled carbon nanotube suspensions, in several kinds of solvents such as distilled water, chloroform, ethanol and ethylene glycol, were measured in the range from room temperature to near to the boiling points of the solvents. The pulsed Nd:YAG laser whose wavelength is 1064 nm and pulse duration is 6 ns was used as a light source. The experimental result shows that the limiting efficiency was reduced as the temperature increased, and the suspension which has lower boiling point, viscosity and surface tension has highest efficiency.
Keywords
optical limiter; carbon nanotube; suspension; reverse saturable absorption; threshold fluence;
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