Monday 30 December 2013

Other benefits of Metamaterial hunt

The new artificial structures called metamaterials soon able to protect buildings from earthquakes. Tsunami waves can also be engineered away from the city, and made ​​the room soundproof.
 During this time known as the metamaterial structure to make objects and people become invisible. But soon the metamaterial will be made more commercial and more real role. Starting from the satellite antenna products to wireless charging cell phone batteries.

Metamaterial structure that is created artificially, the permittivity and permeability deviates from the usual in nature. By stringing material of photonic crystals into the network, the smaller scale of the wavelength want manipulated, theoretically, the waves can be deflected.
When electromagnetic waves - both visible light , microwaves or infrared - can be deflected , meaning that the waves will not be seen or heard at the relevant wave spectrum .
As long as the light is believed can not be controlled in this way using natural materials . The reason , the optical properties of materials depend on the chemical structure of the constituent atoms .
Only after David Smith of Duke University , is touted as a metamaterial father , and his colleagues experimented with changing the geometry of the material in the late 90's , they found a way to alter the interaction with light , or other types of waves - creating a metamaterial .
After that , said Andrea Alu , a professor at the University of Texas , the researchers found " the possibility to change the axioms and constraints that for centuries was considered not to be broken . "
bend light
Several decades of research carried out large - scale , which refers to the findings of Smith , to make objects invisible . At the very least , at a certain wavelength range .
" Now there have been several demonstrations in the sheath creates the visible spectrum , thus making the object invisible . Creating invisible veil is necessary and has been done , " said Jason Valentine of Vanderbilt University , who has made this kind of sheath .
But still there are a number of limitations . Among other things , the act can only be done for a particular wavelength or from a certain angle . However fast the limit is exceeded , said Valentine .
In the past year , Yaroslav Urzhumov of Duke University have made ​​a plastic sheath which deflects microwave beams using a 3D printer regular . While Andrea Alu of the University of Texas made ​​a super thin sheath of electric field .
Army stealth ?
Most funding for metamaterial research in the United States come from the military . Urzhumov via electronic mail to the Reuters news agency says that the U.S. Defense Department is " one of the main sponsors for research metamaterial and the object invisible in America . "
Military interest in making the metamaterial especially protective opaque object to , said Miguel Navarro - Cia from Imperial College London , who underwent research in this topic with funding from the European Defence Agency and the U.S. military .
Another potential use of metamaterial is made ​​of aircraft parts that prevent pilots express their invisibility to be able to see under the cockpit , or help eliminate dead angles motorist in the vehicle .
Making waves
Ong Chong Kim , director of the Superconducting and Magnetic Materials Center at the National University of Singapore , said that although not yet fully metamaterial can be used to make an object invisible , but the method can be used to deflect the other wave types , including mechanical waves such as sound and ocean waves .
Among the beginning of 2013 the French researcher , for example , seismic waves bend around the pits specially designed in the ground, waves reflected back again .
Ong refers to the possible use of the knowledge of geometry reconfiguration material to deflect tsunami waves , so as not to hit strategic buildings .
Metamaterial can also absorb and memamcarkan light with a very high level of efficiency - for example in high-resolution ultrasound - or bend light in a very short distance .
According to Anthony Vicari of consultancy Lux Research , " it can be used to improve the performance of fiber-optic communications network , or even optical communication between mikrochips for faster computing . "
Wireless recharging
Commercial use of metamaterial next most likely wireless recharging electronic devices . A possibility which attracted many industries .
Mark Gostock of ISIS Innovation Ltd , Oxford University research commercialization company , said he is negotiating with a number of manufacturing companies to license ISIS technology . Samsung has filed several patents related to metamaterial and wireless recharging .
Other companies that have registered patents around the metamaterial is Harris Corp. , NEC Corp. , Hewlett - Packard Co. and Panasonic Corp. .
Wil McCarthy of smart window maker RavenBrick LLC in Denver said metamaterial will eventually enter the market without much surprise . His company is now holding the glass polarization metamaterial technology patents .
McCarthy added : " Consumers will buy these products without knowing how it works , and would never want to know or care that they do things that were previously considered impossible to do . "
 
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