Guoqing Tang

TL;DR: In this article, the structure and optical properties of nanometer-sized SnO2 capped by a layer of stearic acid were investigated using TEM, XRD, ESR, UV-visible absorption spectrum, photoluminescence spectra, IR absorption spectra and Z-scan techniques.

TL;DR: In this paper, a single beam Z-scan technique was used to measure the third-order nonlinear refractive index, γ, the two-photon absorption coefficient, s, and the variation of refractive indices per unit photoexcited carrier density σ r, and the free carrier absorption cross section σ ab for quantum-confined Fe 2 O 3 nanoparticles coated by a layer of organic molecular in toluene and bare particles in hydrosol.

TL;DR: In this article, the authors investigated all-optical switching and beam deflection of 2-(2′-hydroxyphenyl) benzoxazole (HBO) in three species of solvent (cyclohexane, ethanol and dimethyl sulfoxide) by using third-harmonic generation (355 nm) of a mode-locked Nd:YAG laser as a pump beam and a continuous-wave He-Ne laser (632.8 nm) as a probe beam.

TL;DR: In this article, ZnO nanoparticles have been successfully loaded in the all-silica molecular sieve MCM-41 and combined powder X-ray diffraction and infrared spectral measurements have been performed to detect the formation and dispersal of nanoparticles in the nanoporous channels host.

TL;DR: In this paper, transient biphotonic holographic grating was studied theoretically and experimentally in trans-cis isomerization azo materials, and it was shown that the mechanism of the grating can be attributed to the redistribution of cis isomers induced by both the short-wavelength light and the long-wvelength light.