Khajavi Shahrzad, Melati Daniele, Cheben Pavel, Schmid Jens H, Liu Qiankun, Xu Dan Xia, Ye Winnie N
Opt Express. 2021 Mar 1;29(5):7003-7014. doi: 10.1364/OE.416986.
We present a compact silicon-based surface grating antenna design with a high diffraction efficiency of 89% (-0.5 dB) and directionality of 0.94. The antenna is designed with subwavelength-based L-shaped radiating elements in a 300-nm silicon core, maintaining high efficiency with a compact footprint of 7.6 µm × 4.5 µm. The reflectivity remains below -10 dB over the S, C and L optical communication bands. A broad 1-dB bandwidth of 230 nm in diffraction efficiency is achieved with a central wavelength of 1550 nm.
我们展示了一种基于硅的紧凑型表面光栅天线设计，其具有89%（-0.5 dB）的高衍射效率和0.94的方向性。该天线采用基于亚波长的L形辐射元件，在300纳米的硅芯中设计，以7.6微米×4.5微米的紧凑尺寸保持高效率。在S、C和L光通信频段，反射率保持在-10 dB以下。在中心波长为1550纳米时，实现了230纳米的宽1 dB衍射效率带宽。
