Vibrational relaxation in neat crystals of naphthalene by picosecond cars

Picosecond delayed CARS experiments on totally symmetric modes in naphthalene at 1.5 K are reported. The Raman lineshape of the vibrational excitons is lorentzian and vibrational relaxation can be surprisingly slow. The Raman lineshape of the A g exciton level of the 766 cm −1 vibrational mode revea...

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Bibliographic Details
Published in:Chemical physics letters 1980-01, Vol.75 (3), p.423-426
Main Authors: Hesp, Ben H., Wiersma, Douwe A.
Format: Article
Language:English
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Summary:Picosecond delayed CARS experiments on totally symmetric modes in naphthalene at 1.5 K are reported. The Raman lineshape of the vibrational excitons is lorentzian and vibrational relaxation can be surprisingly slow. The Raman lineshape of the A g exciton level of the 766 cm −1 vibrational mode reveals that the low-temperature lorentzian lineshape occurs by motional narrowing At higher temperature the exciton is trapped by interaction with lattice phonons.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(80)80547-1