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Related Experiment Video

Updated: Dec 19, 2025

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

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Published on: September 25, 2020

Ultrafast reprogrammable multifunctional vanadium-dioxide-assisted metasurface for dynamic THz wavefront engineering.

Javad Shabanpour¹, Sina Beyraghi², Ahmad Cheldavi²

¹Department of Electrical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16486-13114, Iran. m.javadshabanpour1372@gmail.com.

Scientific Reports

|June 4, 2020

Summary

This study introduces a novel ultrafast, reprogrammable metasurface using vanadium dioxide (VO2) for dynamic terahertz wavefront control. This technology enables rapid switching between multiple functions, crucial for advanced wireless communications.

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Last Updated: Dec 19, 2025

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Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials

Fabrication of Nanopillar-Based Split Ring Resonators for Displacement Current Mediated Resonances in Terahertz Metamaterials

Published on: March 23, 2017

Area of Science:

Photonics and Metamaterials
Terahertz Technology
Materials Science

Background:

Dynamic wavefront engineering is essential for advanced terahertz applications.
Existing metasurfaces often lack ultrafast switching speeds and multi-mission capabilities.
Vanadium dioxide (VO2) offers fast, reversible phase transitions suitable for dynamic control.

Purpose of the Study:

To propose and demonstrate a new generation of ultrafast, reprogrammable, multi-mission bias-encoded metasurface.
To achieve dynamic terahertz wavefront engineering using VO2 phase transitions.
To enable high-speed switching between diverse optical functions.

Main Methods:

Design of a novel meta-atom with three patterned VO2 thin films.
Utilizing the reversible monoclinic to tetragonal phase transition of VO2.
Employing a Field-programmable gate array (FPGA) platform for voltage-controlled biasing.
Applying spiral-like and spiral-parabola-like coding sequences.
Leveraging superposition theorem and convolution operations.

Main Results:

Demonstration of a multi-functional VO2-based coding metasurface (VBCM).
Dynamic tuning of meta-atom states between four configurations ('00'-'11') via biasing voltage.
Successful generation of single and focused vortex beams with switchable orbital angular momentum modes.
Realization of symmetric/asymmetric multiple beams and arbitrarily-oriented multiple vortex beams with controlled topological charges.

Conclusions:

The proposed VBCM offers ultrafast, reprogrammable control over terahertz wavefronts.
This technology is a promising solution for challenges in high data rate wireless communication requiring rapid mission switching.
The demonstrated multi-functionality and dynamic control pave the way for next-generation terahertz systems.