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Large elasto-optic effect and reversible electrochromism in multiferroic BiFeO3.
Nature Communications ( IF 14.7 ) Pub Date : 2016-Feb-29 , DOI: 10.1038/ncomms10718
D. Sando , Yurong Yang , E. Bousquet , C. Carrétéro , V. Garcia , S. Fusil , D. Dolfi , A. Barthélémy , Ph. Ghosez , L. Bellaiche , M. Bibes
Nature Communications ( IF 14.7 ) Pub Date : 2016-Feb-29 , DOI: 10.1038/ncomms10718
D. Sando , Yurong Yang , E. Bousquet , C. Carrétéro , V. Garcia , S. Fusil , D. Dolfi , A. Barthélémy , Ph. Ghosez , L. Bellaiche , M. Bibes
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The control of optical fields is usually achieved through the electro-optic or acousto-optic effect in single-crystal ferroelectric or polar compounds such as LiNbO3 or quartz. In recent years, tremendous progress has been made in ferroelectric oxide thin film technology-a field which is now a strong driving force in areas such as electronics, spintronics and photovoltaics. Here, we apply epitaxial strain engineering to tune the optical response of BiFeO3 thin films, and find a very large variation of the optical index with strain, corresponding to an effective elasto-optic coefficient larger than that of quartz. We observe a concomitant strain-driven variation in light absorption--reminiscent of piezochromism--which we show can be manipulated by an electric field. This constitutes an electrochromic effect that is reversible, remanent and not driven by defects. These findings broaden the potential of multiferroics towards photonics and thin film acousto-optic devices, and suggest exciting device opportunities arising from the coupling of ferroic, piezoelectric and optical responses.
中文翻译:
多铁性BiFeO3具有较大的弹光效应和可逆电致变色现象。
通常通过单晶铁电或极性化合物(例如LiNbO3或石英)中的电光或声光效应来实现对光场的控制。近年来,铁电氧化物薄膜技术取得了巨大进步,该领域现已成为电子,自旋电子学和光伏领域的强劲动力。在这里,我们采用外延应变工程技术来调节BiFeO3薄膜的光学响应,发现光学指数随应变的变化非常大,相当于有效的弹性系数大于石英的弹性系数。我们观察到伴随光吸收的应变驱动变化-让人联想到变色-我们显示可以通过电场来操纵它。这构成了可逆的电致变色效应,保留性强,不受缺陷驱动。这些发现拓宽了多铁电学在光子学和薄膜声光器件领域的潜力,并暗示了由铁磁,压电和光学响应耦合所产生的令人兴奋的器件机遇。
更新日期:2016-03-03
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
多铁性BiFeO3具有较大的弹光效应和可逆电致变色现象。
通常通过单晶铁电或极性化合物(例如LiNbO3或石英)中的电光或声光效应来实现对光场的控制。近年来,铁电氧化物薄膜技术取得了巨大进步,该领域现已成为电子,自旋电子学和光伏领域的强劲动力。在这里,我们采用外延应变工程技术来调节BiFeO3薄膜的光学响应,发现光学指数随应变的变化非常大,相当于有效的弹性系数大于石英的弹性系数。我们观察到伴随光吸收的应变驱动变化-让人联想到变色-我们显示可以通过电场来操纵它。这构成了可逆的电致变色效应,保留性强,不受缺陷驱动。这些发现拓宽了多铁电学在光子学和薄膜声光器件领域的潜力,并暗示了由铁磁,压电和光学响应耦合所产生的令人兴奋的器件机遇。