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Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

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On-Chip Reconfigurable Focusing through Low-Loss Phase Change Materials Based Metasurfaces.

Muhammad Shemyal Nisar¹, Shahid Iqbal², Linjie Zhou^3,4

¹Sino-British College, University of Shanghai for Science and Technology, Shanghai 200093, China.

|December 23, 2022

Summary

This summary is machine-generated.

This study introduces active metasurfaces using phase change materials for on-chip beam steering. This innovation enables advanced analog computations and information processing, paving the way for future technologies.

Keywords:

computing metasurfaces integrated photonics low-loss phase change materials reconfigurable metasurfaces

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Area of Science:

Photonics and Nanotechnology
Materials Science

Background:

Metasurfaces are subwavelength engineered structures offering unique functionalities.
Most metasurfaces are passive, limiting their dynamic applications.
Phase Change Materials (PCMs) enable active metasurface functionalities.

Purpose of the Study:

To present a novel active metasurface design for on-chip beam steering.
To demonstrate beam focusing using active phase switching of PCMs.
To explore applications in analog computation and information processing.

Main Methods:

Numerical simulations were employed to design and analyze the metasurface.
Phase Change Material Antimony(III) sulfide (Sb2S3) was integrated into the metasurface unit cells.
Active phase switching between amorphous and crystalline states of Sb2S3 was utilized for beam steering.

Main Results:

A novel metasurface capable of active on-chip beam steering was numerically demonstrated.
Beam focusing was achieved through the reversible phase transition of Sb2S3.
The metasurface exhibited tunable optical properties via phase switching.

Conclusions:

The developed active metasurface offers a new platform for on-chip beam steering and focusing.
This technology supports on-chip transformation optics and advanced computational architectures.
The integration of PCMs in metasurfaces opens avenues for novel information processing and analog computing.