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Infrared liquid crystal polymer micropolarizer.

Wei-Liang Hsu, Kaushik Balakrishnan, Mohammed Ibn-Elhaj

    Applied Optics
    |October 17, 2014
    PubMed
    Summary

    Researchers demonstrate novel infrared (IR) liquid crystal polymer (LCP) polarizers. These thin-film devices offer arbitrary linear and circular polarization patterns for IR light.

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Infrared (IR) light manipulation is crucial for various applications.
    • Developing advanced polarization control is essential for IR imaging and sensing.

    Purpose of the Study:

    • To demonstrate the fabrication of arbitrary patterned linear and circular IR polarizers.
    • To explore the use of liquid crystal polymers (LCPs) for IR polarization applications.

    Main Methods:

    • Fabrication of linear micropolarizers using IR dichroic dye in an LCP host.
    • Fabrication of circular micropolarizers using cholesteric LCPs.
    • Characterization of polarizer performance across the 700–4200 nm wavelength range.

    Main Results:

    • Achieved arbitrary patterned linear and circular IR polarizers.

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  • Demonstrated feature sizes as small as 4 μm for linear and 6.2 μm for circular micropolarizers.
  • Confirmed operation of thin-film polarizers in the 700–4200 nm wavelength range.

    • Conclusions:

    • Liquid crystal polymers are suitable hosts for creating high-resolution IR polarizers.
    • The demonstrated fabrication methods enable versatile IR polarization control.
    • These novel IR polarizers have potential in advanced optical systems.