• Laser & Optoelectronics Progress
  • Vol. 56, Issue 15, 152501 (2019)
Haojie Hou1, Junyan Liu1、2, Bowen Xiao2, Mingqi Zhu2, and Mengchun Li2、*
Author Affiliations
  • 1 Key Laboratory of Advanced Transducers and Intelligent Control System of the Ministry of Education, Taiyuan, Shanxi 0 30024, China
  • 2 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, Shanxi 0 30024, China
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    DOI: 10.3788/LOP56.152501 Cite this Article Set citation alerts
    Haojie Hou, Junyan Liu, Bowen Xiao, Mingqi Zhu, Mengchun Li. Formation of Orthogonal and Parallel Surface-Lattice Resonances with Asymmetric Nanoparticle Array[J]. Laser & Optoelectronics Progress, 2019, 56(15): 152501 Copy Citation Text show less

    Abstract

    Surface-lattice resonances generated by using noble-metallic nanoparticle arrays can effectively suppress radiation loss, thereby improving the resonance quality factor and increasing localized field intensity. Surface-lattice resonances have been widely used for designing high-performance micro-nano photonic devices. Realizing the simultaneous excitation of orthogonal and parallel surface-lattice resonances is crucial for manipulating the collective responses of nanoparticle arrays, which is also useful for practical applications. Herein, we design an array structure composed of L-shaped nanoantennas. Furthermore, we investigate the optical response caused by the coupling between the Rayleigh anomaly and bonding/antibonding modes. We find that the two kinds of surface-lattice resonances can be excited simultaneously in extinction spectra. Calculation results reveal that the bonding/antibonding modes can be used to couple with Rayleigh anomaly, thereby leading to the formation of orthogonal and parallel surface-lattice resonances. These properties make asymmetric nanoparticle arrays become promising platforms for designing micro-nano photonic devices.
    Haojie Hou, Junyan Liu, Bowen Xiao, Mingqi Zhu, Mengchun Li. Formation of Orthogonal and Parallel Surface-Lattice Resonances with Asymmetric Nanoparticle Array[J]. Laser & Optoelectronics Progress, 2019, 56(15): 152501
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