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Updated: Jan 18, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Metasurfaces with Freely Varying Height in the Visible Using Grayscale Lithography.

Daniel N Shanks¹, Tobias Wenger¹, Richard E Muller¹

¹Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, United States.

|September 11, 2025

Summary

This summary is machine-generated.

Researchers developed a new fabrication method for dielectric metasurfaces, enabling precise control over feature heights. This advancement allows for independent tuning of phase and dispersion, crucial for advanced optical applications.

Keywords:

coronagraphy diffractive optics exoplanets grayscale lithography metasurfaces polarization

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Area of Science:

Optics and Photonics
Materials Science
Nanotechnology

Background:

Metasurfaces offer advantages over conventional optics but are typically limited to uniform feature heights.
Conventional semiconductor fabrication techniques restrict the design freedom of metasurfaces.

Purpose of the Study:

To introduce a fabrication method for creating dielectric metasurfaces with varying feature heights.
To demonstrate enhanced control over phase and dispersion in metasurfaces operating at visible wavelengths.

Main Methods:

Integration of grayscale electron-beam lithography into an atomic layer deposition (ALD)-damascene process.
Fabrication of dielectric metasurfaces with precisely controlled, varying feature heights.

Main Results:

Achieved independent control over the phase and dispersion of metasurfaces.
Observed quasi-periodic oscillations in phase and dispersion due to electric field interactions.
Demonstrated the utility of height control for tailoring metasurface properties.

Conclusions:

The novel fabrication technique overcomes limitations of conventional methods for metasurface manufacturing.
Enhanced control of metasurface properties is beneficial for broadband applications, including retardance correction in telescopes.