Abstract:
Optically and magnetically controlled half-wave meta-dipoles, which are mini-resonators based on a copper multi-pass chiral spiral containing paired cores, were proposed, performed and experimentally investigated in the range of 3–12 GHz in the conditions of rectangular waveguides and free space, representing mini-resonators based on a copper multi-pass chiral spiral containing paired cores: GaAs semiconductor as an optical control element and ferrite as a magnetic element. The dynamics of the resonant responses of reflection and transmission of microwaves was measured during photoexcitation of a semiconductor (fiber-optically 0.97 $\mu$m or at a distance of 0.53 $\mu$m with a laser pointer) and during excitation of ferromagnetic resonance (FMR) in ferrite in the presence of constant magnetic field H$_0$. It is shown that with meta-dipoles, the transformation of responses under external influence is observed and the possibility of independent control of the frequency and intensity of resonances appears, which is in demand in telecommunication microwave devices.
Keywords:half-wave meta-dipole, chiral multi-pass spiral, semiconductor, ferrite, fiber-optic and magnetic control, microwaves, coupled ferromagnetic and dipole resonances.
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