Structural, Linear and Nonlinear Optical Properties of Samarium Doped Tellurite Based Glasses for Potential Optical Switching Application

Abstract

The quaternary {[(TeO 2 ) 0.7 (B 2 O 3 ) 0.3 ] 0.8 [SiO 2 ] 0.2 } 1-x {Sm 2 O 3 } x glasses where x = 0.01, 0.02, 0.03, 0.04 and 0.05 molar fraction were fabricated by using melt quenching method. XRD analysis reveals the glass samples are amorphous. FTIR and deconvolution studies show that Sm2 O3 influences the network modification in the silica borotellurite glass system. The optical bandgap and Urbach energy increase and decrease with the addition of Sm 2O3 beyond 0.02 molar fraction.  Glass samples with metallization criterion values of 0.30399 to 0.31068 can be used in non-linear applications. The nonlinear behaviour of the nonlinear absorption coefficient, nonlinear refractive index, and third order susceptibility can be attributed to changes in the glass structure. FOM values of 1.01 for 0.05 molar fraction of Sm 2O3 doped glasses may be advantageous for all-optical switching (AOS).

Keywords: Rice husk ash silica, Samarium oxide, Silica borotellurite glass, Deconvoluted FTIR, Z-scan, Third order susceptibility