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Related Experiment Video

Updated: Sep 19, 2025

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

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

Published on: September 25, 2020

Broadband, Transmissive, and Cascadable Terahertz Programmable Metasurface.

Hangbing Guo¹, Benwen Chen¹, Yuan Li²

¹Research Institute of Superconductor Electronics (RISE) and Key Laboratory of Optoelectronic Devices and Systems with Extreme Performances of MOE, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China.

|June 5, 2025

Summary

This summary is machine-generated.

This study introduces a new transmissive programmable metasurface for terahertz applications. This novel device enables efficient optical matrix operations with a wide modulation bandwidth, overcoming limitations of existing reflective designs.

Keywords:

broadband tunability programmable metasurface terahertz metasurface terahertz modulation vanadium dioxide

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Last Updated: Sep 19, 2025

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Area of Science:

Optics and Photonics
Metamaterials
Terahertz Technology

Background:

Programmable metasurfaces are key for optical information processing.
Current terahertz metasurfaces are often reflective, limiting integration and bandwidth.

Purpose of the Study:

To develop a transmissive programmable metasurface for efficient terahertz applications.
To demonstrate its capability for matrix operations in a cascaded configuration.

Main Methods:

Fabrication of a transmissive metasurface using a vanadium dioxide film on an ultrathin substrate.
Utilizing an 8x8 array of addressable pixels.
Cascading dual-layer configurations for matrix operations.

Main Results:

Achieved insertion loss < 3 dB in the ON state below 1 THz.
Demonstrated >75% modulation depth from 1.01 to 1.80 THz.
Exhibited >50% modulation across 0.51-1.80 THz (111% modulation bandwidth).
Device operates under bent conditions.

Conclusions:

The proposed transmissive metasurface offers a pathway to compact, efficient, and multifunctional optical systems.
Its thin profile, stacking ease, and efficient transmission are advantageous.
Overcomes limitations of reflective terahertz metasurfaces.