Strong nonlinear absorption in perovskite films
Strong nonlinear absorption in perovskite films
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钙钛矿薄膜中的强非线性吸收
DOI：
10.1364/ome.8.001472
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发表时间：
2018-06-01
影响因子：
2.8
通讯作者：
Guo, Chunlei
中科院分区：
文献类型：
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作者：
Ganeev, Rashid A.;Rao, Konda Srinivasa;Guo, Chunlei
在这项工作中，我们报道了CH3NH3PbX3(其中X是氯、溴或碘卤素原子)钙钛矿薄膜(~200 nm)在40fs，800 nm脉冲下的非线性光学响应的比较研究。我们发现，这些薄膜具有很强的非线性吸收系数，可与报道的薄膜结构的最高值(高达7×10−7 cm W−1)相媲美。我们还分析了CH3NH3PbBr3薄膜的光致发光，证明了发射强度与探测脉冲强度的二次关系，表明发光是双光子机制。
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 (~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 × 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.