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首页> 美国卫生研究院文献>Materials >Broadband Spin-Dependent Directional Coupler via Single Optimized Metallic Catenary Antenna
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Broadband Spin-Dependent Directional Coupler via Single Optimized Metallic Catenary Antenna

机译：宽带旋转依赖定向耦合器通过单个优化的金属凸状天线

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摘要

With the rapid development of on-chip optics, integrated optical devices with better performance are desirable. Waveguide couplers are the typical integrated optical devices, allowing for the fast transmission and conversion of optical signals in a broad working band. However, traditional waveguide couplers are limited by the narrow operation band to couple the spatial light into the chip and the fixed unidirectional transmission of light flow. Furthermore, most of the couplers only realize unidirectional transmission under the illumination of the linear polarized light. In this work, a broadband polarization directional coupler based on a metallic catenary antenna integrated on a silicon-on-insulator (SOI) waveguide has been designed and demonstrated under the illumination of the circularly polarized light. By applying the genetic algorithm to optimize the multiple widths of the metallic catenary antenna, the numerical simulation results show that the extinction ratio of the coupler can be maintained larger than 18 dB in a wide operation band of 300 nm (from 1400 to 1700 nm). Moreover, the coupler can couple the spatial beam into the plane and transmit in the opposite direction by modulating the rotation direction of the incident light. The broadband polarization directional coupler might have great potential in integrated optoelectronic devices and on-chip optical devices.
机译：随着片上光学器件的快速发展，可期望具有更好性能的集成光学器件。波导耦合器是典型的集成光学器件，允许在宽工作带中快速传输和转换光信号。然而，传统的波导耦合器受到窄操作带的限制，将空间光耦合到芯片中并固定的单向传输的光流。此外，大多数耦合器仅在线性偏振光的照明下实现单向传输。在这项工作中，在圆偏振光的照明下设计并在圆偏振光的照明下设计和说明了基于集成在绝缘体上的金属关联天线的宽带偏振定向耦合器。通过应用遗传算法优化金属凸显天线的多个宽度，数值模拟结果表明，在300nm的宽操作带中，耦合器的消光比可以长于18 dB（从1400到1700nm） 。此外，耦合器可以通过调制入射光的旋转方向来将空间梁耦合到平面并沿相反方向透射。宽带偏振定向耦合器可能具有很大的集成光电器件和片上光学器件。

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