Latest Split-ring resonator Stories

2014-01-20 10:28:56

Scientists at the U.S. Department of Energy's Ames Laboratory have demonstrated broadband terahertz (THz) wave generation using metamaterials. The discovery may help develop noninvasive imaging and sensing, and make possible THz-speed information communication, processing and storage. The results appeared in the Jan. 8 issue of Nature Communications. Terahertz electromagnetic waves occupy a middle ground between electronics waves, like microwave and radio waves, and photonics waves, such...

2011-08-15 22:05:59

Physicists from the University of California at San Diego (UCSD) have demonstrated a new technique to control the speed and direction of light using memory metamaterials whose properties can be repeatedly changed. A metamaterial is a structure engineered from a variety of substances that, when put together, yield optical properties that do not exist in nature. In this experiment, the metamaterial in use is a hybrid device made of split ring resonators (SRRs) "“ gold rings with a chunk...

2011-03-02 13:26:47

With NSF support, Elena Semouchkina and colleagues are experimenting with ways of using magnetic resonance to capture rays of visible light and route them around objects, rendering those objects invisible to the human eye By Marlene Cimons, National Science Foundation In 1897, H.G. Wells created a fictional scientist who became invisible by changing his refractive index to that of air, so that his body could not absorb or reflect light. More recently, Harry Potter disappeared from sight after...

2009-11-02 10:23:56

Experimental verification of reversed Cerenkov radiation in left-handed metamaterial A team of physicists has directly observed a reverse shock wave of light in a specially tailored structure known as a left-handed metamaterial. Although it was first predicted over forty years ago, this is the first unambiguous experimental demonstration of the effect. The research is reported in Physical Review Letters and highlighted with a Viewpoint in the November 2 issue of Physics. Light moving in a...

2009-02-25 11:23:17

Solid-state metamaterial device tames terahertz frequencyAn engineered metamaterial proved it can function as a state-of-the-art device in the complex terahertz range of the electromagnetic spectrum, setting a standard of performance for modulating tiny waves of radiation, according to a team of researchers from Boston College, the Los Alamos and Sandia national laboratories, and Boston University.An electrical current applied to the metamaterial "“ a hybrid structure of metallic...

2008-05-29 17:40:00

Resonators couple individually to electric and magnetic fields to absorb all incident radiation CHESTNUT HILL, MA "“ A team of scientists from Boston College and Duke University has developed a highly-engineered metamaterial capable of absorbing all of the light that strikes it "“ to a scientific standard of perfection "“ they report in the latest edition of Physical Review Letters. The team designed and engineered a metamaterial that uses tiny geometric surface features to...

2005-11-29 14:06:08

In his PhD thesis the Pamplona engineer, Francisco Falcone Lanas, has put forward various structures based on what are known as left-handed metamaterials, materials that can be used to make smaller mobile phones, aerials or GPS and which have better specifications and performance. This is the first PhD defended in the world on applications of left-handed metamaterials. Photonic crystal devices The research undertaken by Francisco Falcone in his PhD involved analysing the application of...

Word of the Day
  • An evil spirit; a devil.
  • A nightmare.
  • In astrology, the twelfth house of a scheme or figure of the heavens: so called from its signifying dreadful things, such as secret enemies, great losses, imprisonment, etc.
'Cacodemon' comes from a Greek term meaning 'evil genius.'