Regensburg 2019 – scientific programme
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O: Fachverband Oberflächenphysik
O 12: Nanostructures at Surfaces II: Designer Structures and Surfaces
O 12.7: Talk
Monday, April 1, 2019, 16:45–17:00, H15
Characterization of the optical Kerr-Effect in CsPbBr3-perovskite films — •Daniel Frese1, Linghai Meng2, Haizheng Zhong2, and Thomas Zentgraf1 — 1Universität Paderborn, Warburger Str. 100, 33098 Paderborn — 2Beijing Institute of Technology, Beijing, China
Halide perovskites, like CsPbBr3, have received a lot of attention lately, because of their optical and electronic properties. For example, perovskites have a tunable bandgap and excitons can exist at room temperature, which makes them promising candidates for applications in photovoltaic and electro optical devices. Here, we investigate the optical Kerr-Effect by studying the nonlinear refractive index and nonlinear absorption of CsPbBr3, using the z-scan technique with femtosecond pulsed excitation. The high third-order nonlinearity of thin film perovskites opens up new possibilities in nonlinear optical applications, like nanoscale frequency conversion, wave-mixing, nonlinear holography, and all-optical switching.