Researchers with the University of Texas in Austin made progress in hiding objects from microwaves using special materials — an improvement that may bring them a step nearer to cloaking them from visible light. However, they’re still a long way far from the sort of thing imagined in fantasy movies.
That invisibility cloak Harry Potter throws around himself to hide in plain sight soon might be fact, rather than fiction. Researchers in the University of Texas in Austin have demonstrated one — type of.
The study hid an 18 cm cylindrical tube from microwaves by putting it inside a shell of plasmonic metamaterial.
Metamaterials are artificial materials engineered to possess properties that could not take place naturally.
Plasmonic metamaterials are negative index metamaterials, meaning they’re, in simple terms, invisible at a certain frequency range.
How You View it, The method that you Don’t
When light strikes an item, it bounces off of the object’s surface. We see a physical object if the light bouncing off its surface reaches our eyes.
However, plasmonic metamaterials circumvent that process by scattering light with a frequency that cancels out the rays of light bouncing off them. Meaning the light coming from a surface covered with a plasmonic metamaterial won’t reach your vision from the angle.
The researchers cloaked the tube found in the test having a shell of plasmonic metamaterial, then directed microwaves toward it and mapped the resulting scattered light both across the tube and further away.
The cloak was most reliable once the microwaves were with a frequency of 3.1 GHz and issued over a moderately broad bandwidth.
Rushing Toward Invisibility
The experiment follows on from a similar one conducted in the university in August.
Step 2 to the researchers is to achieve cloaking a three-dimensional object in visible light. However, that could be much more difficult.
“The object concealed was 18 cm, and also the length of a microwave comes from 1 mm to a single meter, and the wave was tuned towards the object to acheive it to vanish,” Rob Enderle, principal analyst with the Enderle Group, told TechNewsWorld.
“If you might want a whole lot of treatments for an object, it likely will be just like simple and far cheaper to get people examine another thing,” Enderle said. “You should hire a magician and not a scientist.”
An analysis team member did not answer our obtain further details.
For Whose Eyes Only?
Research into types of rendering objects invisible continues to be happening for many years, and efforts on this field have the symptoms of speeded up.
Earlier this month, researchers at Cornell University demonstrated ways to cloak a celebration soon enough.
In October, scientists through the University of Texas in Dallas demonstrated a cloaking device that works best underwater and possesses an on/off switch. They used sheets of carbon nanotubes — sheets of carbon one molecule thick shaped into cylindrical tubes.
There’s considerable desire for search engine optimization gainesville because “there’s massive defense money designed for technology such as this, and research lives off defense spending,” Enderle said.