Coherent Scattering of Light by Crystals.
Final rept. 1 Feb 84-31 Jan 85,
MARYLAND UNIV COLLEGE PARK DEPT OF PHYSICS AND ASTRONOMY
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For the past several years we have been studying coherent scattering of red light from a Helium Neon Laser, by sapphire and lithium fluoride crystals. The theory has been presented in earlier proposals, and reports. This theory has been presented in earlier proposals, and reports. This theory predicts that nearly perfect crystals with nuclei having magnetic moments, will absorb light by a collective spin state change. Thus many nuclei change their spin state in a magnetic field, absorbing a single red photon. Experiments have been carried out at liquid helium temperatures, in which light from a helium neon laser interacts with nuclear spins in a crystal. Collective absorption of photons by the spin system is observed, if the spins are polarized by a magnetic field, and appropriate polarized light employed.
- Atomic and Molecular Physics and Spectroscopy