Nanocomposites and nanomaterials

Hong-Ou-Mandel quantum effect on
“polymer - multiwall CNT” composites
Karachevtseva L.A.1, Kartel M.T.2, Lytvynenko O.O.1, Sementsov Yu.I.2
1 Laboratory of Photonic Semiconductor Structures, V. Lashkaryov Institute of Semiconductor Physics, NASU, Prsp. Nauki, 41, Kiev-03028, Ukraine.
E-mail: lytvole@gmail.com
2 Department of Nanoporous and Nanosized Carbon Materials, O. Chuiko Institute of Surface Chemistry, NASU, 17 General Naymov Street, Kyiv 03164 Ukraine.

The possibilities to enhance the properties of nanostructured surfaces are evaluated on “polymer-multiwall carbon nanotube” composites. Influence of sp3 hybridization bonds is investigated in composites derived from polypropylene, polyamide-6, polyamide-12 and polyvinyl chloride after adding CNTs to polymers. IR absorption of “polymer- CNTs" films exceeds that of polymer by 10-103 times in the entire measured spectral range. In addition, two-polar IR absorption are measured on composites with negative components at spectral positions of “D-band” and “2D-band” of sp3 hybridization. In this case, the greater oscillation amplitudes of C-C, CH2 and CH3 bonds correspond to a higher absorption at the oscillation frequencies γω(CН) and γω(CH2). Frequencies of 2D-band correspond to the second order frequencies of D-band. The intensity of 2D band increases with an increase in the concentration of defects. The absorption of light increases when the frequencies of local oscillations of surface bonds in carbon nanotubes correspond to the frequencies of slotted modes along the boundary of the "nanotube polymer" (surface polaritons). Two-polar oscillations have an ultra-small half width 0.4-0.6 cm-1, which indicates a strong interaction of surface polaritons with photons. Vertically polarized light along carbon nanotubes and horizontally polarized light of D and 2D bands resulted in light beams splitting, two-photon interference and realization of the quantum Hong-Ou-Mandel effect.

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