中国物理B ›› 2019, Vol. 28 ›› Issue (7): 74208-074208.doi: 10.1088/1674-1056/28/7/074208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Unidirectional plasmonic Bragg reflector based on longitudinally asymmetric nanostructures

Mingsong Chen(陈名松), Lulu Pan(潘璐璐), Yuanfu Lu(鲁远甫), Guangyuan Li(李光元)   

  1. 1 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
  • 收稿日期:2019-04-19 修回日期:2019-05-14 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Yuanfu Lu, Guangyuan Li E-mail:yf.lu@siat.ac.cn;gy.li@siat.ac.cn
  • 基金资助:

    Project supported by the Shenzhen Research Foundation, China (Grant Nos. JCYJ20160608153308846, JSGG20170822093953679, and JCYJ20180507182444250), the National Key Research and Development Program of China (Grant No. 2017YFC0803506), the National Natural Science Foundation of China (Grant Nos. 61261033 and 61162007), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 20160320).

Unidirectional plasmonic Bragg reflector based on longitudinally asymmetric nanostructures

Mingsong Chen(陈名松)1, Lulu Pan(潘璐璐)1,2, Yuanfu Lu(鲁远甫)2, Guangyuan Li(李光元)2   

  1. 1 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
  • Received:2019-04-19 Revised:2019-05-14 Online:2019-07-05 Published:2019-07-05
  • Contact: Yuanfu Lu, Guangyuan Li E-mail:yf.lu@siat.ac.cn;gy.li@siat.ac.cn
  • Supported by:

    Project supported by the Shenzhen Research Foundation, China (Grant Nos. JCYJ20160608153308846, JSGG20170822093953679, and JCYJ20180507182444250), the National Key Research and Development Program of China (Grant No. 2017YFC0803506), the National Natural Science Foundation of China (Grant Nos. 61261033 and 61162007), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 20160320).

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摘要：

Plasmonic Bragg reflectors are essential components in plasmonic circuits. Here we propose a novel type of plasmonic Bragg reflector, which has very high reflectance for the right-side incidence and meanwhile has extremely large absorption for the left-side incidence. This device is composed of longitudinally asymmetric nanostructures in a metal-insulator-metal waveguide. In order to efficiently analyze, design, and optimize the reflection and transmission characteristics of the proposed device, we develop a semi-analytic coupled-mode model. Results show that the reflectance extinction ratio between plasmonic modes incident from the right-side and the left-side reaches 11 dB. We expect this device with such striking unidirectional reflection performance can be used as insulators in nanoplasmonic circuits.

关键词: plasmonic devices, Bragg reflectors, unidirectional reflection, asymmetric nanostructures

Abstract:

Plasmonic Bragg reflectors are essential components in plasmonic circuits. Here we propose a novel type of plasmonic Bragg reflector, which has very high reflectance for the right-side incidence and meanwhile has extremely large absorption for the left-side incidence. This device is composed of longitudinally asymmetric nanostructures in a metal-insulator-metal waveguide. In order to efficiently analyze, design, and optimize the reflection and transmission characteristics of the proposed device, we develop a semi-analytic coupled-mode model. Results show that the reflectance extinction ratio between plasmonic modes incident from the right-side and the left-side reaches 11 dB. We expect this device with such striking unidirectional reflection performance can be used as insulators in nanoplasmonic circuits.

Key words: plasmonic devices, Bragg reflectors, unidirectional reflection, asymmetric nanostructures

中图分类号:  (Reflectors, beam splitters, and deflectors)

  • 42.79.Fm
42.25.Bs (Wave propagation, transmission and absorption) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)