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Related Experiment Video

Updated: Jun 20, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Broadband exterior cloaking.

Fernando Guevara Vasquez¹, Graeme W Milton, Daniel Onofrei

¹Department of Mathematics, University of Utah, Salt Lake City, UT 84112, USA. fguevara@math.utah.edu

|August 19, 2009

Summary

This summary is machine-generated.

A new cloaking method using active devices effectively conceals objects across many frequencies. Simulations confirm this technique creates a "quiet zone" rendering objects invisible to incoming waves.

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Last Updated: Jun 20, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

Electromagnetism
Acoustics
Wave Physics

Background:

Metamaterials have enabled novel wave manipulation techniques.
Previous cloaking methods often suffer from narrow bandwidth or significant losses.
Active devices offer potential for overcoming limitations of passive cloaking structures.

Purpose of the Study:

To demonstrate the effectiveness of a recently proposed active cloaking method.
To evaluate the cloaking performance over a broad range of frequencies.
To confirm the creation of a 'quiet zone' for object invisibility.

Main Methods:

Utilizing three or more active devices to generate a cloaking field.
Simulating the interaction of a broadband incident pulse with the cloaking system.
Analyzing wave amplitude within the designated cloaking region.

Main Results:

The active cloaking method is effective across a wide frequency spectrum.
Simulations show a significant reduction in wave amplitude within the 'quiet zone'.
Objects placed in the 'quiet zone' exhibit minimal wave interaction, appearing virtually invisible.

Conclusions:

The proposed active cloaking technique offers broadband performance.
This method provides a viable approach for achieving practical invisibility.
Further research can explore real-world implementation of active cloaking devices.