Antimony sulphoiodide (SbSI) is a semiconducting ferroelectric crystal. The
SbSI possesses attractive properties, such as high pizoelectric constant,
very high dielectric permittivity, and high electro-optic coefficient, but
it is very difficult to grow a single crystal with bigger size. Currently,
a method for synthesis of SbSI by liquid reaction has been developed in our
laboratory. Nanocomposites of SbSI dots in sodium borosilicate glass as we
ll as in organic modified silicate (ORMOSIL) matrix have been fabricated by
the sol-gel technique. The dot size is controlled by processing conditions
. The nanocomposites were characterized by x-ray diffraction and high resol
ution TEM. Quantum confinement effect was observed on optical spectra. Nonl
inear optical property, the third order susceptibility chi((3)), of the SbS
I dots-doped glasses was measured by four wave mixing method at 532 nm. The
value of chi((3)) was found to be 6 x 10(-11) esu at this non-resonant wav
elength.