PDF(Pubmed)
Abstract：
Magneto-optical (MO) polymer nanocomposites have emerged as alternatives to conventional MO crystals, particularly in nanophotonics applications, thanks to their better processing flexibility and superior Verdet constants. However, a higher Verdet constant commonly comes with excessive optical loss due to increased absorption and scattering, resulting in a constant or reduced figure-of-merit (FOM) defined as the Verdet constant over optical loss. By doping magnetite (Fe3O4) nanoparticles with Tb3+ ions, we report a new strategy to enhance the Verdet constant without increasing the optical loss. The Fe3O4:Tb3+ nanocomposite is one of a kind that simultaneously achieves a state-of-the-art Verdet constant of 5.6 × 105 °/T·m and a state-of-the-art FOM of 31°/T in the near-infrared region.
摘要：
磁光（MO）聚合物纳米复合材料已经成为传统MO晶体的替代品，特别是在纳米光子学应用中，由于他们更好的处理灵活性和优越的Verdet常数。然而,较高的Verdet常数通常会由于吸收和散射的增加而导致过多的光学损耗，导致恒定或降低的品质因数(FOM)，定义为光学损耗上的Verdet常数。通过用Tb3+离子掺杂磁铁矿（Fe3O4）纳米颗粒，我们报告了一种新的策略来提高Verdet常数而不增加光损耗。Fe3O4：Tb3纳米复合材料是同时实现最先进的Verdet常数5.6×105°/T·m和最先进的FOM31°/T的一种在近红外区域。
