中国物理B ›› 2022, Vol. 31 ›› Issue (1): 14217-014217.doi: 10.1088/1674-1056/ac1332

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Quality factor enhancement of plasmonic surface lattice resonance by using asymmetric periods

Yunjie Shi(石云杰)1,2, Lei Xiong(熊磊)2,3, Yuming Dong(董玉明)2, Degui Sun(孙德贵)1,†, and Guangyuan Li(李光元)2,‡   

  1. 1 Schools of Science, Changchun University of Science and Technology, Changchun 130022, China;
    2 Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
    3 School of Information Science and Engineering, Yunnan University, Kunming 650500, China
  • 收稿日期:2021-05-18 修回日期:2021-07-04 接受日期:2021-07-12 出版日期:2021-12-03 发布日期:2021-12-28
  • 通讯作者: Degui Sun, Guangyuan Li E-mail:sundg@cust.edu.cn;gy.li@siat.ac.cn
  • 基金资助:
    Project supported by the State Key Laboratory of Advanced Optical Communication Systems and Networks, China (Grant No. 2019GZKF2).

Quality factor enhancement of plasmonic surface lattice resonance by using asymmetric periods

Yunjie Shi(石云杰)1,2, Lei Xiong(熊磊)2,3, Yuming Dong(董玉明)2, Degui Sun(孙德贵)1,†, and Guangyuan Li(李光元)2,‡   

  1. 1 Schools of Science, Changchun University of Science and Technology, Changchun 130022, China;
    2 Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
    3 School of Information Science and Engineering, Yunnan University, Kunming 650500, China
  • Received:2021-05-18 Revised:2021-07-04 Accepted:2021-07-12 Online:2021-12-03 Published:2021-12-28
  • Contact: Degui Sun, Guangyuan Li E-mail:sundg@cust.edu.cn;gy.li@siat.ac.cn
  • Supported by:
    Project supported by the State Key Laboratory of Advanced Optical Communication Systems and Networks, China (Grant No. 2019GZKF2).

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摘要： We report that using asymmetric lattice periods can enhance the quality factor of plasmonic surface lattice resonances (SLRs) in two-dimensional array of metal-insulator-metal nanopillars in asymmetric dielectric environment. Simulation results show that by adopting appropriate asymmetric lattice periods, the SLR quality factor can be enhanced by 24% compared with the scenario of symmetric periods. We find that the SLR quality factor is optimized when the resonance wavelength is closest to the Rayleigh cutoff wavelength. We also find that the SLRs effect is polarization sensitive in the proposed structure. We expect this work will advance the engineering of SLRs especially in asymmetric dielectric environments, and will promote their applications in sensing.

关键词: collective resonance, plasmonic nanopillars, surface lattice resonance

Abstract: We report that using asymmetric lattice periods can enhance the quality factor of plasmonic surface lattice resonances (SLRs) in two-dimensional array of metal-insulator-metal nanopillars in asymmetric dielectric environment. Simulation results show that by adopting appropriate asymmetric lattice periods, the SLR quality factor can be enhanced by 24% compared with the scenario of symmetric periods. We find that the SLR quality factor is optimized when the resonance wavelength is closest to the Rayleigh cutoff wavelength. We also find that the SLRs effect is polarization sensitive in the proposed structure. We expect this work will advance the engineering of SLRs especially in asymmetric dielectric environments, and will promote their applications in sensing.

Key words: collective resonance, plasmonic nanopillars, surface lattice resonance

中图分类号:  (Resonators, cavities, amplifiers, arrays, and rings)

  • 42.60.Da
78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))