Amplified Spontaneous Emission from Organic–Inorganic Hybrid Lead Iodide Perovskite Single Crystals under Direct Multiphoton Excitation

Amplified spontaneous emission is observed from the orthorhombic and tetragonal phases of the solution-grown bulk CH3NH3PbI3 single crystals under simultaneous two- and three-photon excitations over a range of operation temperature. The nonlinear optical properties of the crystal are also investigated by measuring the two- and three-photon absorption coefficients of the bulk crystals at room-temperature using the Z-scan technology. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.