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Researchers have recently revealed that hybrid lead halide perovskites exhibit ferroelectricity, which is often associated with other physical characteristics, such as a large nonlinear optical response. In this work, the nonlinear optical properties of single crystal inorganic–organic hybrid perovskite CH3NH3PbBr3 are studied. By exciting the material with a 1044 nm laser, strong two‐photon absorption‐induced...
In the article number 1707175, Chennupati Jagadish, Jr‐Hau He, and co‐workers report the excellent optical nonlinearity of CH3NH3PbBr3 perovskite crystals and its relevant applications. The cover shows the strong two‐photon‐absorption‐induced photoluminescence in single crystal CH3NH3PbBr3 that appears in the green spectral region. Such strong two‐photon absorption suggests promising nonlinear optics...
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