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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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Scientists Just Created a “Thermal Barcode” Technology That Could Make Objects Invisible to Infrared Cameras

Imagine a surface that can control heat the same way a screen controls light. Instead of glowing brighter or dimmer to our eyes, it changes how it appears to infrared cameras. A new breakthrough from researchers at Carnegie Mellon University may have turned that idea into reality.

The research team has developed a tiny programmable device that can manipulate thermal radiation with incredible precision. Their work, published in Science Advances, introduces a new concept called “digitized heat.” The technology works like a thermal display made of invisible pixels, opening the door to advanced thermal camouflage, smart sensing systems, and future wearable technologies.

At first glance, the invention may sound futuristic, but its core idea is surprisingly simple: control heat the way computers control information.

Why Heat Is So Hard to Control

Every object around us emits thermal radiation. Humans, animals, machines, buildings, and even your phone constantly release invisible infrared energy. Thermal cameras detect this radiation and convert it into visible images.

Normally, controlling thermal radiation is extremely difficult. Traditional methods depend on heating or cooling an entire object. That process is slow, energy-intensive, and lacks precision.

For years, scientists could only switch thermal systems between basic states, almost like flipping a light switch on or off. Fine control over different sections of a surface was nearly impossible.

According to lead researcher Xiu Liu, previous systems behaved as one single piece. If one area changed, the whole device changed with it.

This limitation prevented thermal technology from becoming truly programmable.

The Carnegie Mellon team wanted to change that.

Turning Heat Into Pixels

The researchers combined two powerful ideas: metasurfaces and phase-change materials.

Metasurfaces are ultra-thin engineered structures designed to manipulate waves, including light and heat. They can guide and reshape energy in ways normal materials cannot.

The second key ingredient is a special material called germanium telluride, or GeTe.

Phase-change material like GeTe are already used in some electronic memory devices. What makes GeTe remarkable is its ability to change its physical state while keeping that state even after power is removed.

In simple terms, it “remembers” its condition.

That means energy is only needed when switching between states, not for continuously maintaining them. This makes the system extremely energy efficient.

The researchers arranged tiny GeTe ribbons across a metasurface. Each ribbon could be controlled independently, almost like individual pixels on a digital display.

Instead of one large thermal signal, the surface can now produce different patterns of heat emission across different regions.

The result looks similar to a barcode — except it is made from invisible thermal signatures rather than printed ink.

This is why researchers describe it as a “thermal barcode.”

A New Era of Intelligent Thermal Control

Professor Sheng Shen describes the invention as a major step toward intelligent thermal emission control.

The breakthrough is important because it allows continuous tuning instead of simple binary switching.

Earlier thermal systems could mostly jump between two states: high emission or low emission. This new device allows gradual adjustment with much finer control.

Think of the difference between an old black-and-white display and a modern high-resolution screen with millions of shades and colors.

Instead of switching between 0% and 100%, the device can carefully tune thermal output at multiple levels.

That precision could completely transform infrared technologies.

Even more impressive is the speed. The switching process happens in microseconds — millionths of a second. This means the surface can rapidly adapt to changing surroundings in real time.

A thermal camera may see one pattern one moment and a completely different pattern the next.

The Future of Thermal Camouflage

One of the most exciting applications is adaptive thermal camouflage.

Traditional camouflage hides objects from normal sight by blending colors and patterns into the environment. Thermal camouflage works differently. It hides an object’s heat signature from infrared detection systems.

This is becoming increasingly important because modern surveillance, drones, and military systems rely heavily on thermal imaging.

Current thermal camouflage methods are limited and inefficient because they usually depend on bulky cooling systems or static materials.

The new programmable metasurface changes the game.

Instead of merely masking heat, the device can actively reshape and redesign how an object appears to infrared cameras.

A surface could potentially mimic surrounding temperatures or create entirely different thermal patterns.

Because the control is localized, one section of an object can emit more heat while another emits less. This creates complex thermal “images” that were previously impossible.

In the future, objects may dynamically alter their infrared appearance in real time depending on the environment around them.

From Barcodes to Thermal QR Codes

Right now, the research team has demonstrated the technology in a one-dimensional format, similar to a barcode.

But their next goal is far more ambitious.

They want to create full two-dimensional programmable thermal displays — essentially thermal QR codes.

Such systems could store or transmit information through infrared patterns invisible to the naked eye.

This could lead to secure communication technologies, advanced tracking systems, or smart infrared tagging.

Because infrared signals behave differently from visible light, these thermal displays could work in darkness, smoke, fog, or harsh environments where traditional optical systems fail.

Wearables and Smart Sensors

The possibilities extend far beyond camouflage.

Researchers believe the technology could eventually be integrated into flexible materials and wearable devices.

Imagine clothing that adjusts its thermal signature automatically depending on weather conditions or medical needs.

Athletes, firefighters, astronauts, and soldiers could all benefit from fabrics capable of intelligently managing heat radiation.

The system could also become a highly precise infrared light source for chemical and biological sensing.

Many molecules absorb infrared radiation in unique ways, almost like fingerprints. By carefully controlling infrared emission, scientists may develop ultra-sensitive detectors capable of identifying chemicals, pollutants, or diseases with greater accuracy.

This could impact healthcare, environmental monitoring, and industrial safety.

Why This Discovery Matters

At its heart, this breakthrough represents something much larger than a clever thermal device.

It shows that heat can now be controlled digitally.

For decades, computing transformed the world by turning information into programmable bits and pixels. Researchers are now applying similar ideas to thermal energy itself.

If scientists can fully digitize thermal radiation, entirely new technologies may emerge — technologies that today sound like science fiction.

Smart infrared displays, adaptive invisibility systems, programmable thermal electronics, and intelligent heat-management materials could all become possible.

The Carnegie Mellon team has effectively demonstrated that heat no longer has to behave passively.

It can be programmed.

And that changes everything.

Reference: 

  • Xiu Liu et al.
    •  
,
Pixelated electrically reconfigurable metasurfaces for intelligent thermal emission control.Sci. Adv.12,eaeb2016(2026).DOI:10.1126/sciadv.aeb2016

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