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Optical wave-front transformer using the multiple-reflection interference effect inside a resonator.

B B Dingel, M Izutsu, K Murakawa

    Optics Letters
    |January 12, 2008
    PubMed
    Summary
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    We introduce a novel optical wave-front transformer utilizing Gires-Tournois resonators (GTRs) and multiple-reflection interference. This technology enables tunable optical elements, functioning as lenses or mirrors based on resonator length.

    Area of Science:

    • Optics and Photonics
    • Metamaterials
    • Wavefront Engineering

    Background:

    • Traditional optical elements often have fixed functionalities.
    • Phase modification is crucial for advanced optical systems.
    • Gires-Tournois resonators (GTRs) offer unique phase-shifting properties.

    Purpose of the Study:

    • To propose a new class of optical wave-front transformers.
    • To demonstrate a novel mechanism for phase modification using GTRs.
    • To synthesize tunable optical elements with variable functions.

    Main Methods:

    • Utilizing the multiple-reflection interference effect within a Gires-Tournois resonator (GTR).
    • Coating the front surface of the GTR with a graded reflectivity profile.
    • Synthesizing a lenslike element as a proof-of-principle demonstration.

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    Main Results:

    • Demonstrated a tunable optical element based on GTRs.
    • Showcased the ability to synthesize various optical elements by modifying GTR reflectivity.
    • Confirmed that resonator length dictates functionality: mirror, converging lens, or diverging lens.

    Conclusions:

    • A new class of optical wave-front transformers is proposed based on GTRs.
    • The proposed elements offer tunable optical functions (lens/mirror) by adjusting resonator length.
    • This technology opens avenues for versatile optical element design and applications.