论文标题
范德华抗铁磁铁中的腔体增强线性二色性
Cavity-Enhanced Linear Dichroism in a van der Waals Antiferromagnet
论文作者
论文摘要
光学双折射是广泛用于过滤和光束分裂光子的晶体的基本光学特性。双重晶体同时具有线性二色性（LD）的特性，该特性允许具有两种不同极化的光的非对称传播或衰减。 LD的这种特性已从小分子到聚合物和晶体进行了广泛的研究，但很少经过根据意愿进行设计。在这里，我们在范德华抗铁磁（AFM）绝缘子FEPS3中使用新发现的自旋荷兰耦合来诱导大型面内光学各向异性，从而诱导LD。我们报告说，该AFM绝缘子中的LD在频谱和大小上都是随腔耦合的函数而变化的。我们在空腔耦合的FEPS3晶体中证明了近义型ld，并在腔长度和FEPS3厚度的函数中得出其分散体。我们的结果对使用腔线调整的LD作为诊断探针具有很大的意义，并为小相关的量子材料提供了新的机会，并为微型，芯片梁剪裁器和可调过滤器打开了新的机会。
Optical birefringence is a fundamental optical property of crystals widely used for filtering and beam splitting of photons. Birefringent crystals concurrently possess the property of linear dichroism (LD) that allows asymmetric propagation or attenuation of light with two different polarizations. This property of LD has been widely studied from small molecules to polymers and crystals but has rarely been engineered per will. Here, we use the newly discovered spin-charge coupling in van der Waals antiferromagnetic (AFM) insulator FePS3 to induce large in-plane optical anisotropy and consequently LD. We report that the LD in this AFM insulator is tunable both spectrally and magnitude-wise as a function of cavity coupling. We demonstrate near-unity LD in the visible-near infrared range in cavity-coupled FePS3 crystals and derive its dispersion as a function of cavity length and FePS3 thickness. Our results hold wide implications for use of cavity tuned LD as a diagnostic probe for strongly correlated quantum materials as well as opens new opportunities for miniaturized, on-chip beam-splitters and tunable filters.
