论文标题
空气 - 韦尔半膜膜中的半膜膜中的可调超亮石和跨膜反射的组延迟
Tunable superluminal and subluminal reflected group delay in an air-Weyl semimetal film-Weyl semimetal substrate layered system
论文作者
论文摘要
在这项工作中，我们从理论上研究了使用4*4 Magneto-Sporticational矩阵，从空气 - 韦尔半学膜 - 薄膜半度分层结构结构中研究了静脉和倾斜反射的组延迟。我们在这种分层的结构中显示了反射脉冲的正延迟和负面延迟之间的可调节过渡，该结构由Weyl半学层的性质控制，并揭示了其控制从这种结构反射的光脉冲的传播特性的机制。证明反射的组延迟可从正值到负值调谐，反之亦然，这些延迟通过调整入射角，Weyl Semimetal膜的厚度，倾斜参数和费米能来调节。光传播反射群延迟的幅度和迹象的控制代表了缓慢和快速光技术的关键点。我们的结果有助于控制脉冲传播，并且有助于设计基于Weyl半准的延迟设备。
In this work, we theoretically investigate the superluminal and subluminal reflected group delay from an air-Weyl semimetal film-Weyl semimetal substrate layered structure by using 4*4 magneto-optical matrix. We show a tunable transition between positive and negative group delays of reflection pulse in such a layered structure controlled by the properties of the Weyl Semimetal layer and reveal its mechanism to control the propagation properties of the light pulse reflected from such structure. It is demonstrated that the reflected group delays are tunable from positive to negative values and vice versa, which are adjusted by tuning the incident angle, thickness of Weyl semimetal film, tilt parameter, and Fermi energy. The control of the magnitude and the sign of the reflected group delay of light propagation represent a key point in slow and fast light technologies. Our results are helpful to control the pulse propagations and are useful for design of Weyl semimetal-based delay devices.
