Giant nonlinear optical response of nanoporous anatase layersстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A giant nonlinear optical response has been observed for nanoporous layers of titanium dioxide ( anatase) under picosecond laser excitation with photon energy below the gap. At excitation intensity of 10 MW/cm(2) the nonlinear refractive index variation at the wavelength of 1064 nm corresponds to chi((3)) = 2 x 10(-5) esu which is six orders of magnitude higher than the respective value of bulk TiO2. This effect is explained by resonant excitation of electronic states of defects at the developed surface of anatase nanoparticles.