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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Nonlocal Metasurfaces for Optical Signal Processing.

Hoyeong Kwon¹, Dimitrios Sounas¹, Andrea Cordaro^2,3

¹Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA.

Physical Review Letters

|November 10, 2018

Summary

This summary is machine-generated.

Engineered nonlocal metasurfaces enable optical analog signal processing in the momentum domain. This ultrathin platform performs mathematical operations for faster, power-efficient optical image processing and edge detection.

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Area of Science:

Optics and Photonics
Materials Science
Information Technology

Background:

Digital signal processing faces speed and energy limitations.
Metasurfaces efficiently manipulate optical signals in subwavelength volumes.
Nonlocality in metasurfaces is typically an undesirable feature for spatial domain applications.

Purpose of the Study:

To demonstrate metasurface nonlocality can be engineered for momentum domain signal manipulation.
To explore nonlocal metasurfaces for performing mathematical operations.
To pave the way for fast and power-efficient optical signal processing devices.

Main Methods:

Engineering nonlocal responses in ultrathin metasurfaces.
Designing metasurfaces to perform specific mathematical operations.
Investigating momentum domain signal manipulation capabilities.

Main Results:

Metasurface nonlocality was successfully engineered for momentum domain control.
Demonstrated nonlocal metasurfaces performing basic mathematical operations.
Achieved signal manipulation on an ultrathin platform.

Conclusions:

Engineered nonlocality in metasurfaces enables novel momentum domain optical signal processing.
This approach offers a path towards ultrathin, high-performance optical computing devices.
Potential applications include edge detection and advanced optical image processing.