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Electrically controlled dual-mode polarization beam splitter using a nematic liquid crystal.

Vaibhav Sharma, Aloka Sinha

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    |May 1, 2023
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    We developed an electrically controlled polarization beam splitter (PBS) using liquid crystals (LC) and prisms. This active device offers flexible, bistable operation for advanced optical systems.

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    Area of Science:

    • Applied Optics and Photonics
    • Materials Science

    Background:

    • Polarization control is crucial in optics for enhanced system functionality.
    • Existing methods for polarization handling often lack flexibility and active control.

    Purpose of the Study:

    • To introduce an electrically controlled polarization beam splitter (PBS) using nematic liquid crystals (LC).
    • To demonstrate a flexible and active polarization control device for optical applications.

    Main Methods:

    • Fabrication of a polarization beam splitter by sandwiching nematic liquid crystal between two equilateral prisms.
    • Utilizing an externally applied voltage to switch between non-splitting and polarization-splitting modes.

    Main Results:

    • The liquid crystal polarization beam splitter (LC-PBS) operates in two distinct modes, controlled by voltage.
    • The device exhibits bistability, a large splitting angle, and a wide operating range.
    • The proposed device offers ease of fabrication and lower cost.

    Conclusions:

    • Electrically controlled liquid crystal polarization beam splitters offer a flexible and active solution for polarization handling.
    • The demonstrated device provides a cost-effective and high-performance alternative for applied optics.