Scientist Says Metamaterials and 3D Printing Will Lead To Invisibility Cloaks In His Lifetime

IMTS

Share this Article

The world will get considerably more ‘transparent’ if work being done in a lab in Arizona comes to fruition.

Hao Xin, a professor of electrical and computer engineering, has discovered synthetic materials which might one day be used to build microscopes with superlenses and even ‘shields’ which could render military equipment and people invisible to the naked eye.

3d printed wave guideWorking at the Millimeter Wave Circuits and Antennas Laboratory at the University of Arizona, Xin uses metamaterial building blocks and 3D printing to create startling results.

These metamaterials, which can be made via 3D printing from plastics, metals, and a variety of other substances, look a bit like porous plastic balls, tubes, and tiny copper wire circuit boards, but it’s their specialized geometrical patterns which give them their amazing properties. The metamaterial structures can bend waves of energy in unheard of ways so that they exhibit a property called ‘negative refraction.’

3d printed wave guide woodpileYep, the structures are configured to bend a wave backwards, and the discovery could lead to advances like ‘super lensing’ and electromagnetic invisibility.

Xin’s work with energy conservation-based theory, full-wave simulation, and experimental measurement shows the 3D printed samples consisting of sub-wavelength building blocks with embedded microwave tunnel diodes exhibit a “band-limited Lorentzian dispersion” and simultaneously, a negative refractive index.

“Our work provides experimental evidence to the assertion that a stable net gain in negative-index gain medium is achievable,” Xin says. “It proposes a potential solution for the critical challenge current metamateiral technology faces in practical applications.”

According to Xin, the work represents a leap forward towards building what he calls “invisibility cloaks.”

3d printed metamaterialsThe findings have been published in a paper entitled “Microwave Gain Medium With Negative Refractive Index” in the journal Nature Communications.

Imagine a scenario where looking at a person wearing a garment, built with specially-designed refractive properties, would be prevented from seeing the target depending on the refractive index distribution of the pattern.

Xin says sound waves, microwaves, light waves, or seismic waves can be manipulated by metamaterials with negative refraction.

“One of the biggest problems with metamaterials is that they produce energy loss. The waves decay as they pass through the artificial material,” Xin says. “We have designed a metamaterial that retains negative refraction but does not diminish energy.”

The synthetic material constructs do more than prevent energy loss. Xin says they actually cause energy gain, and at least in the case of microwaves, intensify the strength of waves as they passed through this novel material via embedded, battery-powered tunnel diodes and the advantages of micro-nanofabrication techniques.

Funded by the Air Force Office of Scientific Research, the metamaterials research was done with doctoral students in the Millimet3d printed wave guide 2er Wave Circuits and Antennas Lab.

One of those doctoral candidates, Adnan Kantemur, says the work provides a chance to study the ideas in practice and lets students actually make metamaterials rather than simply consider them analytically.

The team says the work has implications well beyond the microwave spectrum and could present opportunities in optics, acoustics, and relating to various types of radiation.

While the metamaterials are very much in the testing phase at this point, Xin says he’s confident they wildest applications of the discovery aren’t that far in the future.

“Invisibility cloaks will be a reality in my lifetime,” Xin says.

Do you believe technology like a 3D printed invisibility cloak will be available in your lifetime? Let us know in the 3D Printing Invisibility Cloaks forum thread on 3DPB.com.

inv

Share this Article


Recent News

Will There Be a Desktop Manufacturing Revolution outside of 3D Printing?

Know Your Würth: CEO AJ Strandquist on How Würth Additive Can Change 3D Printing



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Featured

Pressing Refresh: What CEO Brad Kreger and Velo3D Have Learned About Running a 3D Printing Company

To whatever extent a business is successful thanks to specialization, businesses will nonetheless always be holistic entities. A company isn’t a bunch of compartments that all happen to share the...

Würth Additive Launches Digital Inventory Services Platform Driven by 3D Printing

Last week, at the Additive Manufacturing Users’ Group (AMUG) Conference in Chicago (March 10-14), Würth Additive Group (WAG) launched its new inventory management platform, Digital Inventory Services (DIS). WAG is...

Featured

Hypersonic Heats Up: CEO Joe Laurienti on the Success of Ursa Major’s 3D Printed Engine

“It’s only been about 24 hours now, so I’m still digesting it,” Joe Laurienti said. But even via Zoom, it was easy to notice that the CEO was satisfied. The...

Featured

3D Printing’s Next Generation of Leadership: A Conversation with Additive Minds’ Dr. Gregory Hayes

It’s easy to forget sometimes that social media isn’t reality. So, at the end of 2023, when a burst of doom and gloom started to spread across the Western world’s...