Meta-hologram enabled by a double-face copper-cladded metasurface based on reflection-transmission amplitude coding

Area of Science:

• Optics and Photonics
• Metamaterials
• Electromagnetism

Background:

• Controlling electromagnetic waves is crucial for advanced optical and communication systems.
• Existing metasurfaces often struggle with simultaneous control of both transmission and reflection amplitudes.
• Narrow frequency band operation limits the practical applications of many holographic devices.

Purpose of the Study:

• To propose and validate a double-face copper-cladded meta-hologram.
• To demonstrate efficient manipulation of electromagnetic wave amplitude in both transmission and reflection spaces.
• To overcome the limitations of narrow frequency band operation in metasurface applications.

Main Methods:

• Design of a double-face copper-cladded metasurface.
• Encoding independent image information into the transmission-reflection amplitude.
• Experimental validation through holographic image reconstruction and comparison with simulations.

Main Results:

• The meta-hologram successfully manipulated electromagnetic wave amplitude based on polarization.
• Independent holographic images were encoded and retrieved from transmission and reflection.
• Experimental results qualitatively matched simulation predictions.

Conclusions:

• The proposed meta-hologram offers a novel scheme for full-space electromagnetic wavefront control.
• This technology overcomes the narrow frequency band limitations of previous devices.
• The metasurface enables efficient and independent manipulation of wave amplitude in both transmission and reflection.