文章基本信息

标题：A compact silicon grating coupler based on hollow tapered spot-size converter
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作者：Md Asaduzzaman ; Masuduzzaman Bakaul ; Efstratios Skafidas 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：2540
DOI：10.1038/s41598-018-20875-3
语种：English
出版社：Springer Nature
摘要：A new compact silicon grating coupler enabling fibre-to-chip light coupling at a minimized taper length is proposed. The proposed coupler, which incorporates a hollow tapered waveguide, converts the spot-size of optical modes from micro- to nano-scales by reducing the lateral dimension from 15 µm to 300 nm at a length equals to 60 µm. The incorporation of such a coupler in photonic integrated circuit causes a physical footprint as small as 81 µm × 15 µm with coupling efficiency and 3-dB coupling bandwidth as high as 72% and 69 nm respectively.