科研之友
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摘要
Very sharp 90 degrees micro-bends for adiabatic optical wave propagation in multimode waveguides are demonstrated by an inverse design method, and the devices are fabricated on a silicon-on-insulator platform. The compact bending structures are based on digital waveguide metastructures with footprints as small as 2.6 mu m x 2.6 mu m. For waveguides with widths of 2 mu m and bending radii of only 1 mu m, the TE00 mode is able to turn around the sharp corner with 1 dB loss and > 20 dB suppression ratio to higherorder modes. The transmission spectra of the devices are measured with similar to 1 dB loss over a 40 nm bandwidth which are consistent with the numerical simulations.
- 出版日期2018-6-1
- 单位哈尔滨工业大学
