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

• 作者: Yunjie Shi Lei Xiong Yuming Dong Degui Sun Guangyuan Li
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: ELECTROMAGNETISM,OPTICS,ACOUSTICS,HEAT TRANSFER,CLASSICAL MECHANICS,AND FLUID DYNAMICS
• 页码范围: 412-417
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/ac1332

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.