March 10, 2016
Mohenjo
Technical
amazon, business, Business News, cloak, Hotels, human-rights, Invisibility, Invisibility Cloak, invisible to onlookers, medicine, mental-health, meta-skin, metal alloy called galinstan, research, Science, Science News, Scientists at Iowa State University, silicone fabric, technology, Technology News, travel, vacation
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Ever dreamed of moving about the world invisible to onlookers? Scientists at Iowa State University have come up with a technology that could bring about the invisibility cloak of the future.
In a new paper, scientists illustrate how a stretchy fabric can hide its wearer from radar detection. The technology is called “meta-skin” and uses a metal alloy called galinstan that’s liquid at room temperature. The galinstan is put into electric resonators which act as a liquid wire within a silicone fabric. To shield specific frequencies, scientists had to pull and stretch the cloth until it’s properly “tuned.” When wrapped around a surface, the material can conceal the object’s electromagnetic waves from radar detectors. An Iowa State University statement indicated that its researchers demonstrated 75 percent of radar waves running at a 8 to 10 gigahertz frequency were blocked during tests.
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Invisibility Image Credit: Getty Images
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Click link below for article:
http://mic.com/articles/137262/scientists-are-close-to-designing-a-real-invisibility-cloak#.fVFAJaSiH
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September 22, 2015
Mohenjo
Technical
amazon, business, Business News, flat mirrors, Hotels, human-rights, Invisibility Cloak, invisibility cloaks, Lawrence Berkeley National Laboratory, medicine, mental-health, Predator, research, Science, Science News, technology, Technology News, travel, turning objects into perfect, ultrathin "invisibility" cloak, vacation, Xiang Zhang
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In the movie “Predator,” an alien uses a cloaking device to hide in plain sight, but the effect is far from perfect: The alien’s attempt to conceal itself is thwarted by distortions of light bending around it. Now, researchers have built an ultrathin “invisibility cloak” that gets around this problem, by turning objects into perfect, flat mirrors.
Invisibility cloaks are designed to bend light around an object, but materials that do this are typically hard to shape and only work from narrow angles — if you walk around the cloaked object, for instance, it’s visible. But a new cloak avoids that problem, and is thin and flexible enough to be wrapped around an object of any shape, the researchers said. It can also be “tuned” to match whatever background is behind it — or can even create illusions of what’s there, they added.
Led by Xiang Zhang, director of materials science at Lawrence Berkeley National Laboratory, the group constructed a thin film consisting of a 50-nanometer-thick layer of magnesium fluoride topped by a varying pattern of tiny, brick-shaped gold antennas, each 30 nanometers thick. (For comparison, an average strand of human hair is about 100,000 nanometers wide.) The “bricks” were built in six different sizes, ranging from about 30 to 220 nanometers long and 90 to 175 nanometers wide.
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An illustration of the ultrathin “invisibility” cloak. Light reflects off the cloak (shown by the red arrows) as if it were reflecting off a flat mirror. Courtesy of Xiang Zhang group, Berkeley Lab/UC Berkeley
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Click link below for article:
http://www.nbcnews.com/tech/innovation/hiding-plain-sight-scientists-create-ultrathin-invisibility-cloak-n429421
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June 7, 2013
Mohenjo
Science
amazon, aviation, business, climate, gadgets, gaming, Hotels, huffingtonpost, imperial college london, Invisibility, Invisibility Cloak, Invisibility Time Cloak, Physics, research, Science, Science News, Slideshow, technology, Technology News, Telecommunications, Theoretical Optics, time, Time Cloak, transportation, travel, vacation, videogames
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A new invisibility cloak for data can make information vanish by creating holes in time, new research suggests.
The researchers, who describe their work today (June 5) in the journal Nature, found that by tweaking the optical signals in telecommunications fibers, they created a way to essentially mask data sent between a sender and a receiver to outside observers. This isn’t the first time researchers have taken a page from Harry Potter: Last year, scientists also demonstrated a similar invisibility cloak.
But the new “time cloak” can create many time holes in rapid succession, which means masked data could be sent at commercial data speeds, said Martin McCall, a theoretical-optics researcher at Imperial College London who was not involved in the study.
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Scientists demonstrate how they have have created, a new invisibility technique that doesn’t just cloak an object (like in Harry Potter books and movies), but masks an entire event. It is a time masker that works by briefly bending the speed of light around an event.
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.Click link below for story and slideshow:
http://www.huffingtonpost.com/2013/06/06/time-cloak-invisibility-information-gaps-time_n_3395737.html?ref=topbar
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