论文标题
光子钩具有通过使用三角形中尺度尖锐棱镜形成的调制弯曲角的光子钩
Photonic Hook with Modulated Bending Angle Formed by Using Triangular Mesoscale Janus Prisms
论文作者
论文摘要
在这项研究中，我们提出了三角形中尺度棱镜的新型设计，以生成长光子钩。基于有限差分时间域方法的数值模拟用于检查光子钩的形成机理。计算了微晶体附近的电强度分布，该分布是在两个三角形微晶体的不同重复指数和空间下运行的。 - 内强分布的不对称涡旋导致具有较大弯曲角的长光子钩。光子钩的长度和弯曲角可以通过更改两个三角微晶体之间的空间来有效调节。此外，光子钩的狭窄宽度超出了衍射极限。三角形的Janus微晶体在光学镊子，纳米颗粒排序和操纵和光子电路中具有很高的实用潜力。
In this study, we propose a novel design of the triangular mesoscale Janus prisms for the generation of the long photonic hook. The numerical simulations based on the finite-difference time-domain method are used to examine the formation mechanism of the photonic hook. The electric intensity distributions near the micro-prisms are calculated for operating at different re-fractive indices and spaces of the two triangular micro-prisms. The asymmetric vortexes of in-tensity distributions result in the long photonic hook with large bending angle. The length and the bending angle of the photonic hook are efficiently modulated by changing the space be-tween the two triangular micro-prisms. Moreover, the narrow width of the photonic hook is achieved beyond the diffraction limit. The triangular Janus micro-prisms have high potential for practical applications in optical tweezers, nanoparticle sorting and manipulation and photonic circuits.
