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Giant and Tunable Optical Nonlinearity in Single-Crystalline 2D Perovskites due to Excitonic and Plasma Effects

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Abstract

2D Ruddlesden-Popper-type lead halide perovskites exhibit a strong third-order nonlinear response around excitonic resonance, which is characterized with Z-scan measurements. We find large absolute values and a sign change of both nonlinear refraction and absorption.

© 2019 The Author(s)

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