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News
Physicists control light at the nanoscale Mar 22
Physicists in Europe have unveiled a new technique that can control the intensity distribution of laser pulses at dimensions that are much smaller than the wavelength of the laser light. The method combines pulse-shaping techniques with near-field optics and the researchers claim that it is a major step forward in the development of laser-based tools for the manipulation of matter on a very small length scales (Nature 446 301).
Spins take their time to relax Mar 22
Engineers in the US have discovered that the spin of electrons in organic nanowire "spin valves" is extremely robust. A team of researchers from Virginia Commonwealth University and the University of Cincinnati have found that the "spin-relaxation time" in these wires is at least 1000 times longer than that reported in any other system. The result means that these materials could be ideal for use in spintronics, an emerging field that exploits the spin of the electron to encode information in electronic circuits, computers and other devices (Nature Nanotechnology doi:10.1038/nnano.2007.64).
Magnifying superlenses show more detail than ever before Mar 22
Two teams of physicists from the US have independently created the first truly magnifying "superlenses" using metamaterials with a negative index of refraction. Unlike conventional lenses, superlenses can provide images of almost limitless resolution, and could one day enable the optical imaging of proteins, viruses and DNA.
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