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Biasing of Metal-Semiconductor Junctions

Biasing of Metal-Semiconductor Junctions

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Related Experiment Video

Updated: Sep 13, 2025

A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

Published on: January 26, 2016

Liquid metal-based electromagnetic metasurface for continuous RCS reduction adjustment.

Ping Li, Nuo Xu, Zhou Yang

|July 30, 2025

Summary

This study introduces a novel liquid metal microfluidic metasurface for dynamic electromagnetic property control. This technology enables continuous, low-power, broadband reconfiguration of phase, frequency, and amplitude for advanced electromagnetic applications.

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A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

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Published on: December 27, 2012

Area of Science:

Metamaterials and Nanophotonics
Electromagnetics and RF Engineering
Microfluidics and MEMS

Background:

Metasurfaces offer tunable electromagnetic responses.
Achieving continuous and simultaneous reconfiguration of multiple properties remains a challenge.
Liquid metal offers unique advantages for dynamic control due to its conductivity and fluidity.

Purpose of the Study:

To demonstrate a liquid metal microfluidic metasurface for continuous and simultaneous reconfiguration of electromagnetic properties.
To develop a method for continuous state coding of electromagnetic responses.
To validate the proposed technique through simulations and experiments.

Main Methods:

Fabrication of a metasurface using polydimethylsiloxane (PDMS) array microchannel molding.
Integration of bistable liquid metal microfluidics for independent and differential regulation of split-ring cells.
Development and validation of a continuous state coding method for electromagnetic reconfiguration.

Main Results:

Demonstrated continuous reconfiguration of phase, resonance frequency, and reflection amplitude.
Achieved a frequency reconfiguration range from 2.1 to 5.1 GHz.
Showcased continuous reflection amplitude regulation up to 10 dB within the 2.5 to 6.5 GHz range.
Observed relative and absolute bandwidths of up to 88.89% and 4 GHz, respectively.

Conclusions:

The developed liquid metal microfluidic metasurface enables broadband continuous reconfiguration of electromagnetic properties.
The technique provides an effective approach for multi-bit coding of electromagnetic responses with low-power consumption.
This technology opens avenues for advanced tunable electromagnetic devices.