论文标题
中红外极化工程通过次波长双轴双曲线范德华晶体
Mid infrared polarization engineering via sub-wavelength biaxial hyperbolic van der Waals crystals
论文作者
论文摘要
最近，在$α$ -MOO $ {_ 3} $ -A van der waal晶体中观察到了平面双轴内双曲线 - 在中型频率制度下。在这里，我们提供了薄膜$α$ -moo $ {_ 3} $的全面理论分析，用于将两个中IR光子设备应用于偏光层和一个波板。我们表明，与常规极化器相比，基于$α$ -MOO $ {_ 3} $极化器的巨大灭绝比从$α$ -MOO $ {_ 3} $保持巨大的灭绝比，可能会大大降低设备足迹的可能性。其次，我们进行了$α$ -MOO $ {_ 3} $的$α$ -MOO $ {_ 3} $的波动板的设备优化。我们使用分析和全波模拟使用自然面内双曲线$ -MOO $ {_ 3} $来解释我们的结果。这项工作将通过利用$α$ -MOO $ {_ 3} $的光学各向异性来为中红外光子设备的微型化建立基础。
Recently, in-plane biaxial hyperbolicity has been observed in $α$-MoO${_3}$ --a van der Waal crystal-- in the mid-infrared frequency regime. Here, we present a comprehensive theoretical analysis of thin film $α$-MoO${_3}$ for application to two mid-IR photonic devices -- a polarizer and a waveplate. We show the possibility of a significant reduction in the device footprint while maintaining an enormous extinction ratio from $α$-MoO${_3}$ based polarizers in comparison with that of conventional polarizers. Secondly, we carry out device optimization of $α$-MoO${_3}$ based waveplates with subwavelength thickness. We explain our results using natural in-plane hyperbolicity of $α$-MoO${_3}$ via analytical and full wave simulations. This work will build a foundation for miniaturization of mid-infrared photonic devices by exploiting the optical anisotropy of $α$-MoO${_3}$.
