Abstract
In this report, we theoretically and experimentally demonstrates that multipole modes could be excited effectively in dark plasmonic resonators without introducing any other bright resonators at microwave range based on a two-dimensional frequency selective surface (FSS) structure. These excited multipole resonances are closely related to the coupling strength between adjacent S-LSPs resonators (the periodicity of the FSS). The modes splitting effects and resonance frequencies of the excited multipole modes are regulated by changing the numbers of grooves and inner disk radius, both of which play significant roles in the excitation of the dark S-LSPs disk resonator at normal incidence. Moreover, the multipole resonances characteristics of dark S-LSPs resonators in the case of oblique incidence are also presented. Observation of such multipole resonances in dark S-LSPs without introducing extra bright resonance at normal/oblique incidence would find more potential applications in microwave and terahertz based sensors, plasmonic resonance devices and metamaterial devices.
Highlights
Many new fundamental function microwave circuits based on SPs are exploited and demonstrated for SPPs15–23 and LSPs24–28
The spoof-plasmonic resonators are printed on a liquid crystal polymer (LCP) dielectric substrate (ULTRLAM 385036) offered as a double copper clad laminate with constant relative permittivity of 2.9, substrate thickness of 50 μm and copper laminate thickness of 0.018 mm, using conventional standard printed circuit board (PCB) technology
The modes mappings are somehow arbitrary for different modes, they have a significant symmetry that if we invert the modes mapping about its center: either the mapping shapes of vertical electric field (Ez) are invariant (E(r) = E(−r)) which are called odd modes; or the mapping shapes turn into their own opposite (E(r) = −E(−r)) which are called even modes
Summary
Many new fundamental function microwave circuits based on SPs are exploited and demonstrated for SPPs15–23 and LSPs24–28. A monopole antenna is introduced to induce multipole modes in S-LSPs resonator at grazing incidence and a microwave frequency selective surface consisting of dark S-LSPs resonators is theoretically and experimentally proposed at normal/oblique incidence. The frequency selective surface can acts as a selective electromagnetic switch at some special frequency bands under normal and oblique incidence condition These findings of this report propose a new method to directly excite multipole modes in dark S-LSPs resonators at normal/oblique incidence in microwave, and promise new supplementary applications in microwave and terahertz frequency regime based on S-LSPs resonators, such as point-to-point classified communication, switch, modulators and metamaterials devices
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
