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Photon drag effect in carbon nanotube yarns
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) SEM image of two-ply MWNT yarn obtained by overtwisting singles yarn. (b) SEM image of a single yarn surface at higher magnification. One can observe MWNTs aligned along the yarn axis.

Image of FIG. 2.
FIG. 2.

(a) Schematic presentation of the measured sample, which contains seven two-ply, 12 mm long parallel MWNT yarns placed on a glass substrate between two electrodes. (b) Experimental setup. The sample was attached to the rotating stage that allows us to control the incidence and azimuth angles of the laser beam with respect to the sample surface.

Image of FIG. 3.
FIG. 3.

The dependence of generated dc pulse amplitude on (a) incidence angle and (b) on azimuth angle, measured at and , respectively, at the laser pulse energy of 18 mJ. The experimental points are shown by open circles; dashed lines correspond to (a) and (b) .

Image of FIG. 4.
FIG. 4.

Band structure of graphene in the vicinity of point. Energy and momentum conservation imply that absorption of two photons of the same energy and momentum creates two electrons in the conduction band with different momenta, i.e., light-induced interband transitions produce electric current due to dragging of charge carriers by photons.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photon drag effect in carbon nanotube yarns