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    Area of Science:

    • Organic electronics
    • Photonics
    • Optical sensing

    Background:

    • Organic photodetectors (OPDs) offer tunable spectral response, transmittance, and polarization sensitivity for multispectral sensing.
    • Current multispectral detection methods suffer from limited multicolor capabilities and significant spectral crosstalk.

    Purpose of the Study:

    • To design and optimize single-pixel multispectral detectors using OPDs' polarization sensitivity.
    • To achieve high spectral selectivity and good radiometric performance in multispectral sensing applications.

    Main Methods:

    • Exploiting the inherent polarization sensitivity of organic photodetectors.
    • Integrating birefringent optical filters with OPDs to create novel detector architectures.
    • Investigating and optimizing two architectures: Solc-based and multitwist-retarder-based organic photodetectors.

    Main Results:

    • Demonstrated high spectral selectivity and good radiometric performance in single-pixel multispectral detectors.
    • The Solc-based architecture achieved higher spectral resolution.
    • The multitwist-retarder-based architecture offered a more compact sensor design and greater fabrication flexibility.

    Conclusions:

    • Single-pixel organic photodetectors combined with birefringent filters provide a promising solution for advanced multispectral sensing.
    • The developed architectures address limitations of existing methods, offering improved spectral selectivity and performance.
    • Future work can focus on further optimizing these designs for specific applications and enhanced device integration.