Third-order optical nonlinearity of indium-doped rutile TiO2 thin films

Cui, Liqi; Niu, Ruifeng; Wang, Weitian

doi:10.1117/1.oe.61.5.057105

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2023

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“…This measurement method allows the resolution of the nonlinear refraction n 2 and nonlinear absorption β contributions to the optical nonlinearity. The experimental setup of z-scan measurement has been reported in our previous work [15] . A Nd:YAG mode-locked laser operating at 532 nm with 30 ps pulse was employed as a beam source, which was focused by using a converging lens with 120-mm focal length, leading to a beam waist of ω 0 = 30 μm and a pulsed energy of I 0 = 5.0 μJ at the focal plane.…”

Section: Methodsmentioning

confidence: 99%

Effect of Ba/Sr ratio on the nonlinear optical properties of Ba1-xSrxTiO3 (x = 0.1–0.9) thin films

et al. 2023

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Perovskite-structured barium strontium titanate (Ba 1−x Sr x TiO 3 , x = 0.1-0.9) films have been epitaxially fabricated by using a pulsed-laser deposition technique. The third-order nonlinear optical properties were studied through a z-scan method, allowing the resolution of the nonlinear refractive and absorptive contributions to the responses. Although all the samples show almost the same value of nonlinear absorption coefficient, the extracted nonlinear refractive index of the sample of x = 0.3 is apparently larger than that of other samples. Dependency of the nonlinear optical properties on the Ba/Sr ratio is discussed in terms of the crystal phase transformation and metal-oxygen bond length of the selected materials.

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Section: Methodsmentioning

confidence: 99%