Saturable absorption and reverse saturable absorption of CdGa2Se4 nanoparticles determined by bond strength

Broad -band nonlinear optical response in Bi2Te0.6S2.4 alloys based on alloy engineering

“…To quantify the NLO response of Bi 2 Te 0.6 S 2.4 nanorods in detail, we used the following NLO absorption model to fit the OA Z -scan data: 42 where T ( z ) is normalized transmittance and q 0 = α NL I o L eff , α NL represent the NLO absorption coefficient, L eff ( L eff = (1 − e −α 0 L )/ α 0 ) is defined as the effective thickness, here α 0 is linear absorption coefficient and L ( L = 1 mm) is cuvette thickness, and I 0 is the peak intensity on focal ( Z = 0). α NL of Bi 2 Te 0.6 S 2.4 nanorods can be extracted by fitting the Z -scan.…”

“…To quantify the NLO response of Bi 2 Te 0.6 S 2.4 nanorods in detail, we used the following NLO absorption model to fit the OA Z-scan data: 42 TðzÞ ¼…”

Revealing photoluminescence and nonlinear optical absorption characteristics of PbMo0.75W0.25O4 single crystal for optical limiting applications

“…SA indicates the increase in transmittance depending on the increasing light intensity. This relates to the fact that at relatively low light intensities the available energy levels are filled with excited electrons and no more electrons move these levels through the valence band [39,40]. NA corresponds to the decrease in transmittance due to increasing light intensity and is determined by the NA coefficient.…”