Table 2 Comparison of the reported PBSs
From: Subwavelength silicon photonics for on-chip mode-manipulation
Ref. | Year | Structure | BWEL<0.5dB nm | BWEL<1dB nm | BWEL<1.5dB nm | BWEL<2dB nm | BWER>10dB nm | BWER>15dB nm | BWER>20dB nm | BWER>25dB nm | BWER>30dB nm | Length |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
[61] | 2017 | Bent DC | 85 | 140 | / | / | / | / | 135 | 95 | 70 | 20μm |
[62] * | 2018 | ADC | / | 80 | / | / | / | / | 100 | 60 | 20 | 29.4μm |
[64] * | 2018 | MMI | / | / | / | / | / | / | 20 | / | / | 600μm |
[65] | 2017 | ADC/SWG | / | / | / | 50 | / | 60 | 30 | / | / | 2μm |
[75] * | 2020 | SWG | / | 230 | / | / | 270 | 240 | 230 | 200 | / | 33.6μm |
[76] * | 2018 | bent DC | / | / | 40 | / | 70 | 40 | / | / | / | 1.5μm |
[77] * | 2019 | adiabatic | / | 120 | / | 175 | / | / | 175 | 120 | / | 11μm |
[78] | 2013 | ADC | 150 | / | / | / | / | 250 | 70 | / | / | 48μm |
[79] * | 2016 | Grating | / | 21 | / | / | / | 33 | 30 | 25 | 21 | 27.5μm |
[80] | 2016 | HHPW |  |  |  | 200 | 30 |  |  |  |  | 5μm |
[82] * | 2016 | SWG | / | / | / | / | 115 | 40 | / | / |  | 14.6μm |
[83] * | 2019 | Metamaterial |  | 200 |  |  |  |  | 200 | 175 |  | 12.2μm |