Nonlinear optical properties of Cr³⁺-doped lanthanum-magnesium hexa-aluminate LaMgAl₁₁O₁₉

Abstract

A single beam Z-Scan technique is used to characterize the nonlinear optical properties of Cr3+-doped lanthanum-magnesium hexa-aluminate LaMgAl11O19 with c.w. laser radiation at 514.5 nm. The real part n' 2 = 2.6 × 10-8 cm2/W and the imaginary part n'' 2 = - 1.1 × 10-9 cm2/W of the laser induced complex refractive index are measured. The excited state absorption cross-section is deduced and found to be 3×10-20 cm2 at the same wavelength.

Up-conversion luminescent properties and optical thermometry of LaMgAl11O19: Yb3+/Er3+ phosphors

“…The energy transfer from Tb 3 þ to Mn 2 þ in LaMgAl 11 O 19 : Tb 3 þ , Mn 2 þ phosphors has been investigated by You et al [20]. Furthermore, there were also some reports regarding the UC luminescence RE-ions doped LaMgAl 11 O 19 phosphors [21][22][23]. However, there are few reports on the temperature sensing properties of LaMgAl 11 O 19 : Yb 3 þ /Er 3 þ .…”