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Related Concept Videos

Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Related Experiment Video

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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Switchable reflective lens based on cholesteric liquid crystal.

Jae-Ho Lee, Ji-Ho Beak, Youngsik Kim

    Optics Express
    |May 3, 2014
    PubMed
    Summary

    We developed a switchable reflective lens using cholesteric liquid crystal (CLC) technology. This novel plano-convex CLC lens can be electronically defocused, offering tunable optical properties for advanced applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Cholesteric liquid crystals (CLCs) are known for their selective reflection properties.
    • Tunable optical elements are crucial for advanced photonic devices.

    Purpose of the Study:

    • To demonstrate a switchable reflective lens utilizing a plano-convex cholesteric liquid crystal (CLC) structure.
    • To investigate the optical properties and voltage-controlled tunability of the CLC lens.

    Main Methods:

    • Fabrication of a plano-convex CLC lens by assembling planar and concave substrates.
    • Characterization of the lens's reflective properties, including wavelength selectivity and handedness sensitivity.
    • Application of external voltage to induce defocusing of the reflective lens.

    Main Results:

    • The plano-convex CLC lens exhibited Bragg reflection, functioning as a biconvex lens with consistent curvature.
    • The reflective CLC lens demonstrated wavelength selectivity and handedness sensitivity.
    • Applying external voltage successfully defocused the reflective CLC lens, indicating switchable functionality.

    Conclusions:

    • A switchable reflective lens based on plano-convex CLC has been successfully demonstrated.
    • The CLC lens leverages Bragg reflection for its lensing effect and exhibits voltage-controlled defocusing.
    • This technology holds potential for tunable optical systems and photonic devices.