Magnetic fields revealed in technicolour
Wieder einmal eine grossartige Errungenschaft die sich aus der Nanotechnologie ableitet:
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Magnetic fields revealed in technicolour
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 (17 November, 2005).
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.
The artificial material, created in collaboration with Chernogolovka Institute of Microelectronics Technologies (Russia) and Aston University (UK), has “unnatural” optical properties and could be the precursor of a ‘perfect lens’, focusing images to show features smaller than the wavelength of light itself. It is based on Professor John Pendry’s (Imperial College London) idea of generating the magnetic response in nonmagnetic composites.
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Potential applications of the materials and their unique properties include: smaller and smarter optical lenses, miniature lasers that can be built in computer chips and ultra-sensitive chemical and bio-detectors
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