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Related Experiment Video

Updated: Jun 22, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry.

Nayoung Kim¹, Myungjoon Kim¹, Joonkyo Jung¹

¹Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

Researchers developed novel angle-multiplexed metasurfaces by breaking mirror symmetries. This breakthrough achieves high transmission efficiency and angular sensitivity simultaneously for advanced optical devices.

Keywords:

angle-multiplexed beam deflection broken symmetry effective medium inverse design metalens

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Last Updated: Jun 22, 2026

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Area of Science:

Optics and Photonics
Materials Science

Background:

Optical metasurfaces offer advanced functionalities beyond conventional optics.
Angle-multiplexed metasurfaces enable complex optical functions for applications like LiDAR and augmented reality.
Existing designs face trade-offs between transmission efficiency and angular sensitivity for paraxial rays.

Purpose of the Study:

To overcome the efficiency-angular sensitivity trade-off in angle-multiplexed metasurfaces.
To enable simultaneous high efficiency and high angular sensitivity.
To propose novel metasurface designs for beam-steering and metalens arrays.

Main Methods:

Breaking mirror symmetries in single-layer metasurface structures.
Utilizing effective medium theory to analyze material parameter effects.
Optimizing metasurface designs for specific applications.

Main Results:

Demonstrated simultaneous high sensitivity and high efficiency by breaking mirror symmetry.
Developed an angle-multiplexed beam-steering device with up to 93% relative efficiency.
Created an angle-multiplexed metalens array that overcomes the resolution-density trade-off of microlens arrays.

Conclusions:

Breaking mirror symmetry is key to achieving high efficiency and sensitivity in metasurfaces.
The proposed designs offer significant advancements for compact optical devices.
These angle-selective metasurfaces pave the way for new optical functionalities and applications.