Histological features were useful in the diagnosis of oral cGVHD. It is suggested that CD8-T cells and macrophages play important role in the pathogenesis of the disease.
Colloidal perovskite nanocrystals (PNCs) are among the
most studied
optical materials in the last decade. Because of their remarkable
optical properties, such as high photoluminescence quantum yield,
narrow emission spectra, and high tunability in the visible range,
they have become important candidates for several applications in
optoelectronics technologies. Most recently, several reports have
claimed that this class of nanomaterials also possesses outstanding
third-order nonlinear optical properties, such as a high two-photon
absorption cross section and a high nonlinear refractive index. In
this paper, we investigate the nonlinear optical response for a series
of CsPbBr3 PNCs and show that their nonlinear optical response
is not particularly high. Different from what has been claimed in
the literature, we show that no evidence is found to support that
the nonlinear refractive index for these PNCs is larger than those
observed for other semiconductors, as the measured magnitude varies
between 10–14 and 10–13 cm2/W, the same order of magnitude as bulk semiconductors with
a similar band gap energy.
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