Journal
OPTICAL MATERIALS EXPRESS
Volume 8, Issue 6, Pages 1472-1483Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.8.001472
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Funding
- Natural Science Foundation of China (NSFC) [21404015, 61774155, 61705227]
- National Key Research and Development Program of China [2017YFB1104700]
- Jilin Science and Technology Department Project [20150204019GX]
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In this work, we report a comparative study of the nonlinear optical responses of CH3NH3PbX3 (where X is a chlorine, bromine, or iodine halogen atom) perovskite thin (similar to 200 nm) films using 40 fs, 800 nm pulses. We found that these films possess strong nonlinear absorption coefficients comparable with the highest reported values for thin film structures (up to 7 x 10(-7) cm W-1). We also analyze the photoluminescence emission from CH3NH3PbBr3 film and demonstrate the quadratic dependence of emission intensity on the intensity of probe pulse indicating a two-photon mechanism of luminescence. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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