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In the past decade, a number of interesting designs have been proposed to generate artificial magnetism at optical frequencies using plasmonic metamaterials, but owing to the planar configurations of typically fabricated metamaterials, the magnetic response is mainly driven by the incident electric field. Here, we fabricated vertical split-ring resonators (VSRRs) which behave as magnetic metamolecules...
We present vertical split-ring resonators (VSRRs) which behave as magnetic metamolecules sensitive to both the incident electric and magnetic fields upon excitation. A couple of potential applications such as VSRR-based highly sensitive refractive-index sensor and metasurface for light manipulation in optical communication frequency will also be demonstrated.
In this paper a recent progress of mid-range applications of wireless power transfer is presented. It outlines wireless power transfer standards as well as research activities in the last decade on near-field magnetic coupling wireless power transfer with the transmission distance in the order of or greater than the coil dimension. It also covers metamaterials application to improve the wireless power...
We report on the role of the coupling of the modes of Mie resonances in an all-dielectric metamaterial so as to achieve negative index at terahertz frequencies. We studied this role according to the lattice spacing and according to the frequency overlapping of the modes of resonance. We show that negative effective index requires sufficiently high mode coupling.
A mechanically tunable planar left-handed metamaterial (LHM) using SRR pairs was presented. The two identical SRRs of a SRR pair unit cell are etched on two separate substrates so that the coupling between the two SRRs can be adjusted by slipping one SRR relative to the other. The tunable planar LHM was investigated. The results show that the tunable planar LHM can be tuned within a broad range continuously,...
We review recent progress of the mid-range applications of wireless power transfer (WPT) technology and introduce its main standards. In the last decade, extensive research has been carried out on magnetic coupling wireless power transfer with the transmission distance comparable or greater than the coil dimension. Metamaterials show great abilities to increase the WPT efficiency by controlling the...
We demonstrate ultrafast optical control of near field coupled metamaterial resonances. We observed dynamical transition of the metamaterial resonances to change its state from coupled to decoupled, and back to the coupled state under photoexcitation.
We show theoretically and experimentally that by adjusting the lattice configuration we are able to manipulate the near-field interaction of resonant particles, and thus tune the response of a lattice of split-ring resonators.
We demonstrate the electric and magnetic responses from split-ring resonators (SRR). Our quantitative spectroscopic measurements validate in both polarization dependence and multiple resonant characteristics, facilitating to design the desired responses of SRR for practical applications.
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