title: High-order localized spoof surface plasmon resonances and experimental verifications.
abstract: We theoretically demonstrated and experimentally verified high-order radial spoof localized surface plasmon resonances supported by textured metal particles. Through an effective medium theory and exact numerical simulations, we show the emergence of these geometrically-originated electromagnetic modes at microwave frequencies. The occurrence of high-order radial spoof plasmon resonances is experimentally verified in ultrathin disks. Their spectral and near-field properties are characterized experimentally, showing an excellent agreement with theoretical predictions. Our findings shed light into the nature of spoof localized surface plasmons, and open the way to the design of broadband plasmonic devices able to operate at very different frequency regimes.
authors: State Key Laboratory of Millimetre Waves, Southeast University, Nanjing 210096, China.
authors: Zhen
authors: Z
authors: Liao
authors: 1] Photonic Centre of Excellence (OPTIMUS), School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue 639798, Singapore [2] The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.
authors: Yu
authors: Y
authors: Luo
authors: 1] The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK [2] Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, E-28049 Madrid, Spain.
authors: Antonio I
authors: AI
authors: Fernández-Domínguez
authors: State Key Laboratory of Millimetre Waves, Southeast University, Nanjing 210096, China.
authors: Xiaopeng
authors: X
authors: Shen
authors: The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.
authors: Stefan A
authors: SA
authors: Maier
authors: 1] State Key Laboratory of Millimetre Waves, Southeast University, Nanjing 210096, China [2] Cooperative Innovation Centre of Terahertz Science, , No.4, Section 2, North Jianshe Road, 610054 Chengdu, China.
authors: Tie Jun
authors: TJ
authors: Cui