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Updated: May 28, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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An efficient and compact 1 × 8 beam splitter based on a tapered multimode Si waveguide atλ0= 1330 nm.

Yi-Chun Huang1, Anjali Chandel2, Jia-Ren Wu3,4

  • 1Department of Physics, National Tsing Hua University, No. 101, section 2 Kuang Fu Rd., Hsinchu 30013, Taiwan, R. O. C.

Nanotechnology
|May 26, 2026
PubMed
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An efficient orthogonal coupler for silicon photonics with the degenerate plasmonic modes.

Nanotechnology·2026

Researchers developed a compact silicon photonic 1x8 beam splitter using tapered multimode and S-bend waveguides. This efficient device achieves low insertion loss, enabling high-speed communication chips.

Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Silicon photonics is crucial for high-speed data communication.
  • Efficient beam splitters are essential components in optical circuits.
  • Minimizing insertion loss is a key challenge in integrated optics.

Purpose of the Study:

  • To design and demonstrate an efficient and compact 1x8 beam splitter using silicon waveguides.
  • To investigate the impact of S-bend waveguides on hybrid mode propagation and insertion loss.
  • To facilitate the development of silicon photonic integrated circuits for high data rate communications.

Main Methods:

  • Combining tapered multimode and short S-bend silicon waveguides.
  • Fabricating a 1x8 beam splitter structure.
Keywords:
1 × 8 beam splittershort S-bend Si waveguidesuppressed bending losstapered multimode Si waveguide

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  • Characterizing the device at a wavelength of 1330 nm to measure splitting ratios and insertion loss.

    • Main Results:

    • An efficient and compact 1x8 beam splitter was successfully fabricated.
    • Splitting ratios across 8 output channels ranged from 11.09% to 11.50%.
    • A low insertion loss of 0.42 dB was achieved, attributed to S-bend waveguides suppressing bending loss.

    Conclusions:

    • The proposed 1x8 beam splitter demonstrates high efficiency and compactness.
    • Short S-bend silicon waveguides effectively reduce bending loss for hybrid modes.
    • This technology advancement supports the creation of advanced silicon photonic integrated circuits for high data rate applications.