Biomedical Engineering Reference
In-Depth Information
3.10
SHG (532 nm) spectra for (a) multicomponent glass and (b)
30KTP- 70SiO
2
nanocomposite prepared by heating at 750
8
C;
(c) fundamental beam (1064 nm).
31
3.11
Dependence of SHG signal intensity from
x
KTP-(1
x
)SiO
2
heat
C on P/Si ratio.
31
treated at 750
8
optical SHG in the KTP/SiO
2
nanocomposites is incoherent. Therefore,
oriented nanocomposites may exhibit a strong phase-matched SHG.
Li et al.
31
also plotted the dependence of SHG intensity on P/Si ratio in
xKTP-(1
x)SiO
2
nanocomposites, as shown in Fig. 3.11. The SHG signal
intensity increases as a function of P/Si ratio, which suggests that the SHG
signal increases as a function of KTP content. Li et al. also stated that the
base glass is the amorphous portion of the transparent nanocomposite and
so it should exhibit negligible SHG. This implies that the nanocomposites
are expected to exhibit SHG signal intensity lower than pure KTP powders,
depending on the content of ferroelectric crystallites in the glasses. Optical
SHG has been reported for transparent silicate and borate glass-ceramics
