Light Scattering with Laser Sourcesing by particles of air as the explanation for the blueness of the sky. This idea was pursued by many scientists including Newton and Tyndall who tried with only limited success to identify the particles responsible for the scattering. Lord Rayleigh following a suggestion by Maxwell, finally prov
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Raman Scattering by Polaritons in Polyatomic Crystalsbility, [{chi _pi }^{left( 1
ight)},overrightarrow {left( u
ight)} ] and χ.. (E), respectively. In polyatomic crystals, polaritons correspond to photons coupled to all of the q ≈ 0 IR active TO phonons. [{chi _pi }^{left( 1
ight)},overleftarrow {left( u
ight)} ] is accordingly expressed in terms
Polarition Intensities in ,-Quartzal materials, and the effect of birefringence, damping, and index of refraction variation near the laser frequency were examined. However, interest in polariton cross-sections was dormant until Faust and Henry discovered a zero in the nonlinear electric susceptibility of GaP and showed how Poule
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