Dynamically reconfigurable 2D polarization-agnostic image edge-detection using nonvolatile phase-change metasurfaces.

Area of Science:

• Photonics and optical engineering.
• Materials science, focusing on chalcogenide phase-change materials.
• Computational imaging and analog computing.

Background:

• Optical analog computing offers low-energy, high-speed imaging solutions.
• Nonlocal metasurfaces perform analog image processing efficiently.
• Current metasurfaces have fixed functionalities after fabrication.

Purpose of the Study:

• To develop reconfigurable nonlocal metasurfaces for versatile optical analog computing.
• To demonstrate switching between different imaging modes using a single device.
• To explore the potential of novel materials for dynamic optical functions.

Main Methods:

• Fabrication of nonlocal metasurfaces using low-loss chalcogenide phase-change materials (Sb2Se3).
• Investigation of the reconfigurability of metasurface properties.
• Demonstration of switching between 2D edge-detection, bright-field imaging, and image blurring modes.

Main Results:

• Achieved reconfigurable nonlocal metasurfaces with low-loss chalcogenide materials.
• Successfully demonstrated switching between edge-detection and bright-field imaging modes.
• Showcased the ability to switch between edge-detection and image blurring modes.

Conclusions:

• Reconfigurable nonlocal metasurfaces offer dynamic control over optical beam manipulation.
• Chalcogenide phase-change materials enable versatile imaging functionalities in compact devices.
• This work paves the way for adaptable optical analog computing and next-generation imaging systems.