𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Transient grating spectroscopy of exciton sound waves in dense exciton fluids

✍ Scribed by Jan A. Leegwater; Shaul Mukamel

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
480 KB
Volume
203
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

A dynamic description is developed for the motion of an exciton fluid at high exciton density. Coherent oscillatory modes of the exciton density are predicted provided the exciton-phonon coupling is suffkiently small. The physical mechanism is similar to that of sound waves in an ordinary gas. A method to probe these motions using transient grating with strong pump fields is proposed. The grating recurrence time is estimated to be about 100 ps for typical molecular crystals. Exciton Bose condensation could also be probed using the same technique.

πŸ“œ SIMILAR VOLUMES

Triplet excitons in molecular crystals:
Triplet excitons in molecular crystals: a study of the width of the exciton wave packets in tetrachlorobenzene by electron spin echo spectroscopy
✍ J.F.C. Van Kooten; A.J. Van Strien; J. Schmidt πŸ“‚ Article πŸ“… 1982 πŸ› Elsevier Science 🌐 English βš– 447 KB

The width in k-space of the wart packets m the line= chvn trIplet exciton system of 1.2;15-tetrachlombcnzene has beenderrved irom the vanxion of the tnplet spm phase memory tune Tht over the zero-field hneshapes. This wldlh appears to be k mdepcndent.