Measurement of the group velocity of polaritons in anthracene crystal
Vidmont N. A., Maksimov A. A., Tartakovskii I.I.
The group velocity of polaritons in the range 3 Χ 107-3 Χ105 cm s~1 is measured from the time delay of tunable dye-laser pulses passing through thin single crystals of anthracene. A comparison of experimental results with numerical calculations gave the values of the parameters determining the dispersion curve for the lowest polariton branch.