论文标题
巨型Terahertz拉动力在散发出的逃生场中，通过波耦合到辐射和界模式
Giant terahertz pulling force within an evanescent field propelled by wave coupling into radiation and bound modes
论文作者
论文摘要
通过工程化在环境培养基中的电磁波来操纵亚波长对象对于多种粒子处理技术是关键的。在这封信中，我们从理论上说明了使用沉积在高索引底物上的石墨烯单层工程设计紧凑且可调的基于等离子体的Terahertz Tweezer的可能性。在总内部反射照明下，这种设备被证明能够诱导增强的旋转极化性，从而使定向近场耦合进入石墨烯等离激子模式和底物中的辐射模式。由于总动量保护，净力施加在粒子点上的方向与令人兴奋的evanevanscent场的推动力相反。我们的结果可以基于纳米颗粒与电磁模式场之间的极化依赖性相互作用，从而有助于对光子设备的新实现。
Manipulation of subwavelength objects by engineering the electromagnetic waves in the environment medium is pivotal for several particle handling techniques. In this letter, we theoretically demonstrate the possibility of engineering a compact and tunable plasmon-based terahertz tweezer using a graphene monolayer that is deposited on a high-index substrate. Under total-internal-reflection illumination, such device is shown to be capable of inducing an enhanced rotating polarizability thus enabling directional near-field coupling into the graphene plasmon mode and radiation modes in the substrate. As a result of the total momentum conservation, the net force exerted on the particle points in a direction opposite to the pushing force of the exciting evanescent field. Our results can contribute to novel realizations of photonic devices based on polarization dependent interactions between nanoparticles and electromagnetic mode fields.
