Alchemy with light shocks physicists
May 22, 2003 | Source: NewScientist.com news service
MIT researchers have developed a way to shift the frequency of light beams to any desired color, with near 100 per cent efficiency.
The effect uses shock waves passing through a crystal to Doppler-shift the frequency. If it can be harnessed, it will revolutionize a range of fields, for example, turning heat into light or into terahertz rays for medical imaging or improving the efficiency of optical telecommunications networks.