Table 4 Crosstalk of different structures with no strips and with adding Si & Ge strips between two Si waveguides.
Two Silicon waveguide structure λ = 3.5 µm, L ≈ 840 µm | Optimal ds (nm) | da (nm) | Crosstalk (CT) dB |
|---|---|---|---|
No-strip | 0 | 500 | 0 |
1-Si strip | 170 | 165 | − 2.143 |
4-Si strips | 59 | 52.8 | − 9.832 |
1-Ge strip | 180 | 160 | − 8.1537 |
2-Ge strips | 147 | 68.66 | − 34.646 |
