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A four-layer square split-rings frequency selective surface is applied for designing a polarization converter. The new proposed polarizer operates in broadband, from 6.4 to 13.7GHz, which can generate circularly polarization waves from incident linearly ones at 45° title incidence to the structure. The new polarization converter is optimized and fabricated. Experimental results show that the polarizer...
We demonstrate a compact and broadband 1 × 4 optical switch based on W2 photonic crystal waveguides (PCWs). The footprint of the W2 PCW is only 17.6 μm × 8 μm. An operation bandwidth of 15 nm ± 1 nm is implemented with an extinction ratio over 15 dB in each channel. By introducing the thermal insulation trench, the tuning efficiency is enhanced at least 77% in experiment. The experimental results...
Broadband (18 nm) switching functionality is realized by an ultra-compact (8 μm×17 μm) W2 photonic crystal waveguide with integrated microheater on the surface. Extinction ratio larger than 15 dB is obtained over the entire bandwidth.
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