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Schematic depiction of gyrotropic waveguide-switch with one-dimensional magnetophotonic crystal. A magneto-optic feeder section precedes the band gap structure. A scanning-electron micrograph of the magnetophotonic crystal on the ridge waveguide is also shown.
Transmittance spectra for transverse (gray) and longitudinal (black) magnetization for horizontally polarized input. The inset displays transmittance spectra for transverse magnetization and vertical input (quasi-TM) and horizontal input (quasi-TE), showing separation of the corresponding stop bands. The spectra are normalized to the transmittance of a ridge waveguide without photonic crystal pattern.
Transmitted light through the magnetophotonic crystal optical switch for longitudinal magnetization (left) and transverse magnetization (right) at 1522.8 nm wavelength. The input polarization is horizontal. The electromagnet on sample holder used to switch the applied magnetic field from collinear to transverse relative to the ridge waveguide axis is also shown.
Waveguide mode indices in the photonic-crystal and feeder sections.
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