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Optical detection and modulation at 2µm-2.5µm in silicon.

D J Thomson, L Shen, J J Ackert

    Optics Express
    |June 13, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Silicon photonics show enhanced performance for 2μm telecommunications. The plasma dispersion effect is more effective, and defect-based photodetectors achieve 2-2.5μm detection, though responsivity decreases with wavelength.

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    Area of Science:

    • Photonics and optical communications
    • Semiconductor device physics
    • Materials science

    Background:

    • The 2μm wavelength region is a promising frontier for advanced telecommunication systems.
    • Silicon photonics offers a scalable platform for optical modulation and photodetection.

    Purpose of the Study:

    • To experimentally characterize silicon-based plasma dispersion effect (PDE) optical modulation at 2μm.
    • To evaluate defect-based photodetector performance in the 2-2.5μm range.
    • To compare PDE effectiveness at 2μm versus traditional telecom wavelengths.

    Main Methods:

    • Experimental characterization of silicon PDE optical modulators.
    • Fabrication and testing of defect-based photodetectors.
    • Performance evaluation across the 2-2.5μm wavelength spectrum.

    Main Results:

    • Plasma dispersion effect in silicon shows significantly enhanced modulation efficiency at 2μm compared to 1.3μm and 1.55μm.
    • Defect-based photodetectors successfully achieved optical detection within the 2-2.5μm range.
    • Photodetector responsivity decreased as wavelength increased beyond 1.55μm.

    Conclusions:

    • Silicon photonics is highly effective for optical modulation in the emerging 2μm telecommunication band.
    • Defect-based photodetectors are viable for 2-2.5μm detection, with performance optimization needed for longer wavelengths.