Wang Yun, Shi Wei, Wang Xu, Lu Zeqin, Caverley Michael, Bojko Richard, Chrostowski Lukas, Jaeger Nicolas A F
Opt Lett. 2015 Oct 15;40(20):4647-50. doi: 10.1364/OL.40.004647.
We present a methodology to design broadband grating couplers using one-dimensional subwavelength gratings. Using the presented method, we design subwavelength grating couplers (SWGCs) with 1-dB bandwidths ranging from 50 to 90 nm. Our designed SWGCs have competitive coupling efficiency, as high as -3.8 dB for the fundamental TE mode, and state-of-the-art back reflections, as low as -23 dB.
我们提出了一种使用一维亚波长光栅设计宽带光栅耦合器的方法。使用所提出的方法，我们设计了1 dB带宽范围从50至90 nm的亚波长光栅耦合器（SWGC）。我们设计的SWGC具有有竞争力的耦合效率，基模TE的耦合效率高达-3.8 dB，并且具有高达-23 dB的最先进的背向反射。
