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Electrowetting-actuated optofluidic phase modulator.

Wenjie Zhang, Rui Zhao, Yijia He

    Optics Express
    |March 17, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an optofluidic phase modulator using electrowetting. The device precisely controls optical phase shifts by manipulating liquid interfaces with voltage, enabling new optical applications.

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    Area of Science:

    • Optofluidics
    • Photonics
    • Materials Science

    Background:

    • Optofluidic devices offer tunable optical properties.
    • Electrowetting provides a method for precise liquid manipulation.
    • Phase modulation is crucial for various optical systems.

    Purpose of the Study:

    • To present a novel optofluidic phase modulator based on electrowetting.
    • To demonstrate voltage-controlled optical phase shifting.
    • To explore the potential of this technology in optical applications.

    Main Methods:

    • Fabrication of a prototype optofluidic phase modulator with inner and outer chambers.
    • Utilizing two immiscible liquids and a transparent sheet to maintain a flat liquid-liquid interface.
    • Applying varying voltages to control the movement of the liquid interface and alter optical path length.

    Main Results:

    • Successful fabrication and experimental validation of the optofluidic phase modulator.
    • Demonstrated optical phase shift up to approximately 6.68π.
    • Achieved phase modulation with an applied voltage of 150 V.

    Conclusions:

    • The electrowetting-based optofluidic phase modulator is a viable technology.
    • The device offers significant optical phase shift capabilities.
    • Widespread applications in photonics and optical systems are foreseeable.