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首页> 美国卫生研究院文献>Advanced Science >Solution‐Processed Faraday Rotators Using Single Crystal Lead Halide Perovskites
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Solution‐Processed Faraday Rotators Using Single Crystal Lead Halide Perovskites

机译：使用单晶卤化钙钛矿的溶液处理法拉第转子

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Lead halide perovskites (LHPs) have become a promising alternative for a wide range of optoelectronic devices, thanks to their solution‐processability and impressive optical and electrical properties. More recently, LHPs have been investigated in magneto‐optic studies and have exhibited spin‐polarized emission, photoinduced magnetization, and long spin lifetimes. Here, the viability of methylammonium lead bromide (MAPbBr ) single crystals as solution‐processed Faraday rotators is demonstrated. Compared to terbium gallium garnet, the industry standard in the visible, it is found that MAPbBr exhibits Verdet constants (i.e., strength of Faraday effect) of similar or greater magnitude (up to 2.5x higher), with lower temperature dependence. Due to its low trap absorption, it is calculated that an optical isolator made from MAPbBr , with appropriate antireflection coatings, should reach ≈95% transmission and achieve 40 dB isolation for incoming powers of over 2 W. It is also shown that the Verdet constant of MAPbBr can be calculated accurately from its dispersion in refractive index, allowing the possibility to predict similar effects in other perovskite materials.
机译：卤化钙钛矿（LHP）的解决方案可加工性以及令人印象深刻的光学和电学特性，已成为各种光电器件的有前途的替代品。最近，在磁光研究中对LHP进行了研究，并显示出自旋极化发射，光致磁化和长自旋寿命。在此，证明了甲基铵溴化铅（MAPbBr）单晶作为溶液处理法拉第旋转器的可行性。与可见光的工业标准ter镓石榴石相比，发现MAPbBr表现出相似或更高幅度的Verdet常数（即法拉第效应强度）（最高高达2.5倍），并且具有较低的温度依赖性。由于它的低陷波吸收，经计算，由MAPbBr制成的光学隔离器，加上适当的减反射涂层，对于超过2 W的入射功率，应达到≈95％的透射率并达到40 dB的隔离度。还显示了Verdet常数MAPbBr的折射率可以从其折射率的分散度中准确计算出来，从而有可能预测其他钙钛矿材料中的类似作用。

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