This manuscript discusses investigations into currents induced in linear conductors. The induced current is a useful indicator of the amount of scattering an electromagnetic field encounters in the presence of a linear conductor, and hence, the ease with which such a linear conductor could be sensed using electromagnetic radiation. The variation of induced current with several parameters is assessed using Method of Moment calculations. The final portion of the presentation will involve a comparison of the modeling results with acquired experimental data. Such comparisons are important for benchmarking theoretical models and will undoubtedly stimulate ongoing research.
We demonstrate a high-speed magneto-optic (MO) beam deflector baseo n iron garnet materials. In this design, the two films are dynamically activated by external magnetic fields to achieve the necessary phase shift to enable beam deflection. Using standard material parameters, a deflection efficiency of 20% is predicted at an operating frequency of 1.0 GHz. Diffraction effects and temporal response are discussed and illustated using a quasi-time-dependent beam propagation method. This theoretical framework is not only useful for the demonstration of the MO beam deflector, but it is also applicable in the design and optimization of other magneto-photonic devices.
We present a tunable wideband bismuth-substituted yttrium iron garnet (Bi-YIG) waveguide magnieto-optic (MO) modulator. An 800 nm optical beam is modulated through active control of the magnetization of the Bi-YIG film. Large bandwidth optical modulation is achieved by driving the device in a non-resonant mode that is well below the ferromagnetic resonance frequency of the film. The MO modulator is capable of operating at bandwidths higher than 1 GHz by tuning the applied static magnetic field.