Optical limiting properties of singlewall carbon nanotubes

Nonlinear optical absorption and reflection of single wall carbon nanotube thin films by Z-scan technique

“…The Z-scan method has great advantages because of its simplicity as well as high sensitivity, by which one can 2 investigate nonlinear absorption and nonlinear refraction separately. [10][11][12][13] It was found that the nonlinear absorption coefficient β ((5.4 ± 2.0) × 10 −7 cm/W) and nonlinear refractive index n 2 ((1.1 ± 0.5) × 10 −11 cm 2 /W) measured from our homogeneously deposited SWNT films are larger or somewhat smaller than the previous values of SWNTs, and are considerably greater than those of other optical materials.…”

“…) are greater than those of SWNT/Triton X100 suspension 11 and SWNT/polyvinyl alcohol composite, 2 but are somewhat smaller than those of SWNT film 7,17 and SWNT/SDS suspension 18 .…”

“…Unfortunately, previously published studies about nonlinear optical properties of carbon nanotubes have been carried out in solution 11 or on poorly dispersed nanotube films and composite. 2 The use of nanotube suspensions results in poorly resolved data, because a large background signal inevitably exists and an inhomogeneously deposited film and dispersed composite make the absorption and reflection measurements in the same sample difficult.…”

Third-order Optical Nonlinearities of Singlewall Carbon Nanotubes for Nonlinear Transmission Limiting Application

“…Ultrafast nonlinear optical responses [1,2], resonant saturable absorption [3,4], and off-resonant nonlinear optical response [2,5] of carbon SWNTs in suspensions and in films have been investigated extensively recently. The nonlinear transmission limiting properties of carbon SWNTS in watersurfactant suspensions were also demonstrated by excitation with 532 and 1064 nm lasers in seven nanoseconds temporal pulse width [6]. The dominant mechanisms of optical power limiting by the carbon SWNT in water-surfactant suspensions were nonlinear scattering and nonlinear refraction.…”

Investigation of optical limiting based on the combination of stimulated Brillouin scattering and carbon nanotube/HT-270 suspension

“…The structure of the carbon nanotube is either a single-wall or a multi-wall depending on the number of the grapheme sheet. The carbon nanotube has been recognized as a good material for broadband optical limiting (Vivien et al, 2000;Sun et al, 1998;Chen et al, 1999;Zhang et al, 2005a). The optical limiting property of a carbon nanotube mainly results from its nonlinear scattering during which the laser pulse leads to vaporization and ionization of the carbon nanotube and the generation of the microplasma.…”