Sulfate may play an important role in the wavelength dependence of laser induced damage.
Sulfate replacement of potassium dihydrogen phosphate (KDP) was studied by the first-principles simulation method and the density of of its states was calculated. We found that sulfate can reduce the band gap of KDP crystal to 3.90eV (318nm), which is consistent with the experimental work of others and indicates that sulfate may be a source of the low damage threshold.
Liang
Li
L
Xian
Zhao
Z
Xun
Sun
S
Xueqin
Sun
S