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    A compact silicon grating coupler based on hollow tapered spot-size converter

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    Author
    Asaduzzaman, M; Bakaul, M; Skafidas, E; Khandokar, MRH
    Date
    2018-02-07
    Source Title
    Scientific Reports
    Publisher
    NATURE PUBLISHING GROUP
    University of Melbourne Author/s
    Skafidas, Efstratios; Khandokar, Md.Rezwanul Haque; Asaduzzaman, Md; BAKAUL, MASUDUZZAMAN
    Affiliation
    Electrical and Electronic Engineering
    Metadata
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    Document Type
    Journal Article
    Citations
    Asaduzzaman, M., Bakaul, M., Skafidas, E. & Khandokar, M. R. H. (2018). A compact silicon grating coupler based on hollow tapered spot-size converter. SCIENTIFIC REPORTS, 8 (1), https://doi.org/10.1038/s41598-018-20875-3.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/255801
    DOI
    10.1038/s41598-018-20875-3
    Abstract
    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.

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