Light stopped for over a second
Wednesday, September 14, 2005
Researchers at the Australian National University used a technique called electromagnetically induced transparency in which a beam of laser light puts the atoms in a solid sample into a state in which a signal light pulse can be trapped.
Most previous stopped-light demonstrations have used gases rather than solid materials. Light had previously been stopped in a solid (yttrium-silicate doped with atoms of praseodymium), but only for a few milliseconds.
Although the efficiency of the storage was low in this experiment, the researchers believe they can improve the efficiency by using a thicker sample and by increasing the concentration of praseodymium in the sample. The technique could be useful in quantum information processing applications such as quantum computers.
- J. J. Longdell, E. Fraval, M. J. Sellars, and N. B. Manson. "" — , August 2, 2005