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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Related Experiment Video

Updated: Jan 8, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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    A new numerical method accurately computes optical system imaging performance with metasurfaces. This enables direct system design optimization, integrating metasurface properties into optical modeling for improved accuracy.

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    Area of Science:

    • Optics and Photonics
    • Computational Electromagnetics
    • Optical Engineering

    Background:

    • Metasurfaces offer novel optical functionalities but integrating them into system design is challenging.
    • Accurate and efficient modeling is crucial for optimizing optical systems containing metasurfaces.

    Purpose of the Study:

    • To develop a fast and accurate numerical method for computing the imaging performance of optical systems with metasurfaces.
    • To enable the direct design of full optical systems, including metasurfaces, within an optimization loop.

    Main Methods:

    • Approximating metasurface optical response using a surrogate model based on meta-atom properties.
    • Employing generalized Snell's law and a hybrid ray/wave optics model for system performance calculation.
    • Accounting for diffraction effects at metasurfaces using the hybrid model.

    Main Results:

    • The developed numerical method accurately predicts the imaging performance of centimeter-scale optical systems with metasurfaces.
    • A hybrid ray/wave optics model is essential for accurate modulus transfer function prediction in systems with high-power metasurfaces.
    • The surrogate model facilitates the inclusion of metasurfaces in optimization design loops.

    Conclusions:

    • The proposed numerical method enables efficient and accurate design of optical systems incorporating metasurfaces.
    • The hybrid model provides necessary physical accuracy for systems with significant metasurface optical power.
    • This work advances the direct design of complex optical systems leveraging metasurface technology.