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dc.creatorScott, J. F.en_US
dc.creatorCheesman, L. E.en_US
dc.creatorPorto, S. P. S.en_US
dc.descriptionAuthor Institution: Bell Telephone Laboratories Incorporated, Murray Hillen_US
dc.description.abstractMixed electromagnetic-mechanical excitations known as ``polaritons'' are observed in Raman forward-scattering experiments on $\alpha$-quartz using an argon laser. Dispersion relations of the polariton frequencies are extended from the case of simple diatomic lattices to a more complex system, namely, $\alpha$-quartz, which has nine atoms per unit cell. The depedence of frequency upon scattering angle observed for these mixed excitations in quartz is shown to be in very good agreement with that predicted. Polaritons associated with the transverse phonons at 1072, 797 and $450 cm^{-1}$ in $\alpha$-quartz are discussed in the present work. The polariton associated with the $1072 cm^{-1}$ phonon mode is observed to range in frequency from 1072 to $833 cm^{-1}$; the polariton associated with the $797 cm^{-1}$ phonon mode is observed at frequencies from 797 to $700 cm^{-1}$; and that associated with the $450 cm^{-1}$ phonon mode is observed from 450 to $407 cm^{-1}$.en_US
dc.format.extent134940 bytes
dc.publisherOhio State Universityen_US

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