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Updated: Feb 11, 2026

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CdTe microwires as mid-infrared optical waveguides.

Chenguang Xin, Hao Wu, Yu Xie

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    |May 3, 2018
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    Summary

    Cadmium telluride microwires demonstrate excellent optical waveguiding for mid-infrared (MIR) applications. These cadmium telluride (CdTe) microwires offer low loss, enabling future MIR microphotonics and circuits.

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    Area of Science:

    • Materials Science
    • Optics
    • Photonics

    Background:

    • Cadmium telluride (CdTe) possesses a high refractive index and broad transparency in the mid-infrared (MIR) spectrum.
    • Developing efficient waveguides for MIR applications is crucial for microphotonics.

    Purpose of the Study:

    • To fabricate and characterize cadmium telluride (CdTe) microwires for optical waveguiding in the MIR range.
    • To evaluate the waveguiding performance and losses of CdTe microwires.

    Main Methods:

    • CdTe microwires (MWs) were fabricated using a thermal evaporation process.
    • Mid-infrared (MIR) light was coupled into individual CdTe MWs.
    • Optical waveguiding properties and losses were experimentally measured up to 8.6 μm.

    Main Results:

    • CdTe microwires exhibited excellent optical waveguiding properties within the MIR spectral range.
    • Waveguiding losses were measured to be between 1.3 and 13 dB/cm.
    • The fabricated microwires demonstrated effective light confinement and propagation.

    Conclusions:

    • CdTe microwires are suitable for use as waveguides in MIR microphotonic circuits.
    • These results highlight the potential of CdTe microwires for advanced optical applications.
    • CdTe microwires can function as wavelength or subwavelength-width waveguides.