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Compact Broadband Directional Couplers Using Subwavelength Gratings
2016
IEEE Photonics Journal
We experimentally demonstrate compact broadband directional couplers using subwavelength gratings for silicon-on-insulator wafers with silicon layers of 220 nm. The dispersion properties of the optical modes are engineered using subwavelength gratings, which allow broadband operation. Finite-difference time-domain (FDTD)-based band structure calculations, with significantly reduced simulation time, were used to analyze the design, which included both the structure and material dispersions.
doi:10.1109/jphot.2016.2574335
fatcat:a46ozydy2bh63o5c6z32f77gne