Artificial Black Holes Made with Metamaterials
Design for Manmade Light Trapping Device Could Help Harvest Light for Solar Cells
While our direct knowledge of black holes in the universe is limited to what we can observe from thousands or millions of light years away, a team of Chinese physicists has proposed a simple way to design an artificial electromagnetic (EM) black hole in the laboratory.
In the Journal of Applied Physics, Huanyang Chen at Soochow University and colleagues have presented a design of an artificial EM black hole designed using five types of composite isotropic materials, layered so that their transverse magnetic modes capture EM waves to which the object is subjected. The artificial EM black hole does not let EM waves escape, analogous to a black hole trapping light. In this case, the trapped EM waves are in the microwave region of the spectrum.
The so-called metamaterials used in the experiment are artificially engineered materials designed to have unusual properties not seen in nature. Metamaterials have also been used in studies of invisibility cloaking and negative-refraction superlenses. The group suggests the same method might be adaptable to higher frequencies, even those of visible light.
"Development of artificial black holes would enable us to measure how incident light is absorbed when passing through them," says Chen. "They can also be applied to harvesting light in a solar-cell system."
The article, "A simple design of an artificial electromagnetic black hole" by Wanli Lu, JunFeng Jin, Zhifang Lin, and Huanyang Chen appears in the Journal of Applied Physics. See: http://link.aip.org/link/japiau/v108/i6/p064517/s1
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ABOUT JOURNAL OF APPLIED PHYSICS
Journal of Applied Physics is the American Institute of Physics' (AIP) archival journal for significant new results in applied physics; content is published online daily, collected into two online and printed issues per month (24 issues per year). The journal publishes articles that emphasize understanding of the physics underlying modern technology, but distinguished from technology on the one side and pure physics on the other. See: http://jap.aip.org/
The American Institute of Physics is a federation of 10 physical science societies representing more than 135,000 scientists, engineers, and educators and is one of the world's largest publishers of scientific information in the physical sciences. Offering partnership solutions for scientific societies and for similar organizations in science and engineering, AIP is a leader in the field of electronic publishing of scholarly journals. AIP publishes 12 journals (some of which are the most highly cited in their respective fields), two magazines, including its flagship publication Physics Today; and the AIP Conference Proceedings series. Its online publishing platform Scitation hosts nearly two million articles from more than 185 scholarly journals and other publications of 28 learned society publishers.
Jason Socrates Bardi | Newswise Science News
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