http://www.physorg.com/news8226.html Vibrations of magnetization have for the first time been captured on camera by scientists at The University of Manchester revealing a rainbow of colours.
For the first time, images of induced magnetic pulsations at the frequency of visible light have been captured - as reported in Nature.
The colours are produced when a new type of material, created by the research team, is exposed to light. The magnetic vibrations induced in the material are so strong that they change the colour of the material from yellow to green. Such vibrations are supposed to be impossible in a natural medium.
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The nanofabricated material was created by covering a glass plate with pairs of tiny gold pillars, each about 100 nanometres high. It was found that as light interacts with the structures, the induced currents create magnetic vibrations inside the pillar pairs and alter reflection properties, unlike a normal piece of gold. The research shows that negative permeability - a necessary condition for achieving a left-handed material - is indeed possible for visible light waves.
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