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Related Experiment Video

Updated: Nov 2, 2025

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

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Common-path angular-multiplexing holographic data storage based on computer-generated holography.

Naru Yoneda, Teruyoshi Nobukawa, Toshiyuki Morimoto

|June 15, 2021

Summary

This summary is machine-generated.

A novel holographic data storage method uses a computer-generated hologram (CGH) for angular multiplexing. This common-path technique simplifies optical setups, enabling efficient data recording without bulky interferometers.

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Area of Science:

Optics and Photonics
Information Storage

Background:

Traditional angular-multiplexed holographic data storage often relies on complex Mach-Zehnder interferometers.
Bulky optical setups limit the practicality and scalability of existing holographic storage systems.

Purpose of the Study:

To propose and demonstrate an unconventional angular-multiplexed recording technique for holographic data storage.
To simplify the optical configuration for holographic data storage using computer-generated holograms (CGHs).

Main Methods:

Utilized a computer-generated hologram (CGH) to reconstruct both signal and reference beams simultaneously.
Implemented a common-path optical configuration, eliminating the need for a Mach-Zehnder interferometer.
Achieved angular multiplexing by adjusting the diffraction angle of the reference beam from the CGH.

Main Results:

Successfully demonstrated multiplexed recording of four data pages.
The proposed common-path setup significantly reduces the bulkiness of the optical system.
Verified the feasibility of the CGH-based angular multiplexing technique.

Conclusions:

The proposed CGH-based angular-multiplexed recording technique offers a more compact and potentially more efficient approach to holographic data storage.
This method paves the way for simplified and scalable holographic data storage systems.