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首页> 外文期刊>Materials Science and Engineering. B, Solid-State Materials for Advanced Technology >Stimulated emission from microcrystalline CsPbBr_3 films: Edge emission versus surface emission
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Stimulated emission from microcrystalline CsPbBr_3 films: Edge emission versus surface emission

机译:微晶CsPbBr_3薄膜的受激发射:边缘发射与表面发射

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摘要

Stimulated emission from microcrystalline CsPbBr_3 films is measured under several excitation/detection geometries including the measurements of optical gain. Threshold for stimulated emission is strongly dependent on the geometries. In particular, in the stripe-shape excitation geometry, the edge luminescence is, unlike the case for the simultaneously measured surface luminescence, solely composed of stimulated emission even for a very low excitation fluence of a few kW/cm~2, suggesting a very low threshold for the stimulated emission. The net optical gain at 77 K amounted to 130cm~(-1) at 32kW/cm~2 excitation fluence and increased up to 300 cm~(-1) at 210kW/cm~2.
机译:在几种激发/检测几何结构(包括光学增益的测量)下测量微晶CsPbBr_3膜的受激发射。受激发射的阈值在很大程度上取决于几何形状。特别是,在条形激发几何结构中,与同时测量的表面发光不同,边缘发光仅由受激发射组成,即使对于几千瓦/ cm〜2的非常低的激发通量也是如此。受激发射的低阈值。在32kW / cm〜2激发通量下,在77 K下的净光学增益为130cm〜(-1),在210kW / cm〜2下的净光学增益增加至300cm〜(-1)。

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