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Graphene-based mid-infrared plasmonic isolator with multimode interferometer

机译:基于石墨烯的中红外等离子体隔离器,具有多模干涉仪

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摘要

This Letter presents an extremely compact graphene-based plasmonic isolator with a two-port multimode interference (MMI) structure. The proposed structure utilizes the non-reciprocal phase shift effect to provide optical isolation. A new approach is used for MMI-based isolator design in terms of mth overall self-imaging. The influence of the device geometries and m parameter on the isolation ratio (ISR), insertion loss, operation bandwidth (BW), and required magnetic field strength B and its appropriate direction is investigated. The device has an ultra-small footprint compared to the operating wavelength of lambda = 8 mu m with high ISR. An MMI isolator with a size of 0.5 mu m x 4.02 mu m (approximate to lambda(2)/32) and ISR = 18.35 dB and an MMI isolator with a size of 0.7 mu m x 7.44 mu m (approximate to lambda(2)/12) with ISR = 27.1 dB are achieved. Moreover, the non-reciprocal MMI shows ultra-wide 20 dB isolation BW of 0.75-2.34 THz. (C) 2020 Optical Society of America
机译:这封信介绍了一个非常紧凑的石墨烯类等离子体隔离器,具有双端口多模干涉(MMI)结构。 所提出的结构利用非互易相移效应来提供光学隔离。 一种新的方法用于MMI的隔离器设计,在MTH整体自成像方面。 研究了器件几何和M参数对隔离比(ISR),插入损耗,操作带宽(BW)和所需磁场强度B及其适当方向的影响。 与高ISR的Lambda = 8 mu m的操作波长相比,该装置具有超小型占地面积。 一个尺寸为0.5μmx4.02 mu m的MMI隔离器(近似到Lambda(2)/ 32)和ISR = 18.35dB和尺寸为0.7μmx7.44 mu m的MMI隔离器(近似于lambda(2)/ 12)使用ISR = 27.1dB。 此外,非互换MMI显示出0.75-2.34至THz的超宽20 dB隔离BW。 (c)2020美国光学学会

著录项

  • 来源
    《Optics Letters》 |2020年第20期|共4页
  • 作者

    Heidari Mohsen; Ahmadi Vahid;

  • 作者单位

    Tarbiat Modares Univ Dept Elect &

    Comp Engn Tehran 14115116 Iran;

    Tarbiat Modares Univ Dept Elect &

    Comp Engn Tehran 14115116 Iran;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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