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Related Experiment Video

Updated: May 2, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Deterministic approach to design passive anomalous-diffraction metasurfaces with nearly 100% efficiency.

Zhening Fang¹, Haipeng Li², Yan Chen³

¹State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Physics Department, Fudan University, Shanghai, 200433, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

Researchers developed a new method for designing passive metasurfaces that achieve nearly perfect anomalous reflection at arbitrary angles. This breakthrough offers a physically guided approach for advanced wave-control applications.

Keywords:

anomalous reflector deterministic approach high efficiency metasurfaces surface-impedance

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Area of Science:

Metasurface optics
Electromagnetics
Nanophotonics

Background:

Designing anomalous reflectors for metasurface applications is challenging, especially for large bending angles.
Existing methods often require unrealistic materials or lack physical guidance, relying on brute-force optimization.

Purpose of the Study:

To propose a deterministic approach for designing passive metasurfaces for efficient anomalous reflection.
To enable control of reflected light to arbitrary nonspecular directions with high efficiency.

Main Methods:

A deterministic design approach based on matching boundary conditions with self-consistently added near-field modes.
Retrieving the surface-impedance profile from given incident and out-going waves.
Constructing metadevices using passive meta-atoms with local responses.

Main Results:

Demonstrated anomalous reflection to a 70° angle with approximately 98% efficiency in a proof-of-concept microwave metasurface.
Fabricated a second metasurface capable of generating multiple reflected beams with controlled angles and power allocations.

Conclusions:

The proposed deterministic approach enables the design of high-efficiency passive metasurfaces for arbitrary anomalous reflection.
This work provides a physically guided pathway for realizing advanced wave-control functionalities in metasurfaces.