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Freeform three-dimensional embedded polymer waveguides enabled by external-diffusion assisted two-photon lithography.

Ho Hoai Duc Nguyen, Uwe Hollenbach, Ute Ostrzinski

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    This summary is machine-generated.

    Researchers developed a novel method for fabricating 3D single-mode waveguides using two-photon lithography and monomer diffusion. This technique enables high-density optical interconnects with low transmission loss.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Nanofabrication

    Background:

    • Advancements in optical interconnects are crucial for high-bandwidth data transmission.
    • Existing fabrication methods for three-dimensional (3D) waveguides often involve complex multi-step processes.
    • Development of novel photopolymers with desirable optical and physical properties is ongoing.

    Purpose of the Study:

    • To introduce a unique and efficient method for fabricating free-form symmetrical 3D single-mode waveguides.
    • To demonstrate the potential of this technique for creating high-density optical interconnects.
    • To characterize the optical and material properties of the fabricated waveguides.

    Main Methods:

    • Fabrication using a combination of two-photon lithography and external monomer diffusion.
    • Utilizing a single layer of a newly developed photopolymer material.
    • Achieving a high refractive index contrast of 0.013.

    Main Results:

    • Successful fabrication of free-form symmetrical 3D single-mode waveguides.
    • The cured photopolymer exhibits high chemical and thermal stability.
    • Achieved a low transmission loss of 0.37 dB/cm at 850 nm wavelength.

    Conclusions:

    • The developed fabrication technique is efficient and versatile for creating complex 3D waveguide structures.
    • The high density achievable in waveguide arrays suggests suitability for 3D optical interconnects.
    • This method offers a promising pathway for high-complexity, high-bandwidth density optical interconnects at the board level.