Frequency-selective propagation of localized spoof surface plasmons in a graded plasmonic resonator chain

Abstract

Localized spoof surface plasmon polaritons (spoof-SPPs) in a graded spoof-plasmonic resonator chain with linearly increasing spacing are experimentally investigated at microwave frequencies. Transmission measurements and direct near-field mappings on this graded chain show that the propagation of localized spoof-SPPs can be cutoff at different positions along the graded chain under different frequencies due to the graded coupling between adjacent resonators. This mechanism can be used to guide localized spoof-SPPs in the graded chain to specific positions depending on the frequency and thereby implement a device that can work as a selective switch in integrated plasmonic circuits.

Binding interaction study on human serum albumin with bactericidal gold nanoparticles synthesized from a leaf extract of Musa balbisiana: a multispectroscopic approach

“…UV–vis absorption spectra are reasonably sensitive to GNs formation, as surface plasmon resonance of GNs gives an intense absorption peak. This spectrum describes the collective excitation of conduction electrons in nanoparticles . The characteristic UV–vis spectrum of these MGNs showed the highest absorption intensities at 539 and 652 nm, which were absent in the MBLE spectrum (Fig.…”

Multipole Modes Excitation of uncoupled dark Plasmons Resonators based on Frequency Selective Surface at X-band Frequency Regime

“…1 indicates that the first three resonance modes (dipole (M 1 ), quadrupole mode (M 2 ) and hexapole mode (M 3 )) are located in X-band. Because that the dipole mode and quadrupole mode in S-LSPs resonators are the commonly modes which were used as the operation modes in microwave applications 24 , 37 , so we emphatically study resonance characteristics of the first three modes in X-band frequency range at normal incidence. Fig.…”

“…This planar periodic corrugated structure have the merit of compatibility and integration with the conventional microwave components and circuits, meaning that the microwave surface plasmons (SPs) circuits can be manufactured using the planar printed circuit board (PCB) technology. Since then, many new fundamental function microwave circuits based on SPs are exploited and demonstrated for SPPs 15 – 23 and LSPs 24 – 28 .…”

“…The existing excitation methods for dark S-LSPs resonators can be classified as two types: grazing incidence and normal incidence. Normal incidence is always used as the excitation source 29 , 30 in terahertz and optical frequency regime, but grazing incidence source is conventionally used in microwave frequency range 24 – 28 which cannot be extend into the terahertz or optical range due to physical dimension limit. In the microwave frequency range, the reported researches of excitation methods for dark S-LSPs resonators are primarily concentrated on grazing incidence, which extra introduces another bright resonance (monopole antenna 25 and Vivaldi antenna 31 ) to induce multipole resonance modes in dark S-LSPs resonators.…”

Analog signal processing in the terahertz communication links using waveguide Bragg gratings: example of dispersion compensation

“…This resulted in a broadband tunable THz device offering a small negative GVD on the order of tens of /( • ). Meanwhile, Gao et al [21] used a graded plasmonic resonator chain for the dispersion control in the microwave range. The authors theoretically predicted that localized spoof surface plasmon polaritons in the resonator chain provide both positive and negative dispersion that can be easily tailored by tuning the structural parameters.…”