Interchain dynamics and side-group modulation of excitons in a polydiacetylene
- 15 April 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 41 (11) , 7933-7936
- https://doi.org/10.1103/physrevb.41.7933
Abstract
Picosecond pump-probe spectroscopy has been used to investigate the interchain dynamics of excitons in the polydiacetylene poly-[2,4-Hexadiyn-1,6-diol-Bis(p-toluene sulfonate)] (PTS). At low temperatures, where neighboring chains are inequivalent, pumping either chain forms excitons that decay in a few picoseconds with no significant interchain energy transport. We observe a novel long-lived modulation of the exciton absorption which we attribute to coupling of photogenerated excitons with a dimerized antipolar lattice formed by the TS side groups. Full ground-state recovery does not occur until nanoseconds after photoexcitation.Keywords
This publication has 14 references indexed in Scilit:
- Picosecond photoinduced exciton bleaching in emeraldine base: Crossover in decay mechanismsPhysical Review B, 1989
- Spectrum of(-3ω;ω,ω,ω) in polyacetylene: An application of free-electron laser in nonlinear optical spectroscopyPhysical Review Letters, 1989
- Nonlinear optical response of excitons confined to one dimensionPhysical Review Letters, 1987
- The dielectric permittivity and phase transition in the bis-(p-toluene sulphonate) of 2,4-hexadiyne-1,6-diol polymer single crystalJournal of Physics C: Solid State Physics, 1987
- Nonlinear optical processes in a polydiacetylene measured with femtosecond duration laser pulsesApplied Physics Letters, 1986
- Growth of large-area thin-film single crystals of poly(diacetylenes)Macromolecules, 1985
- On the possibility of exciton site splitting in PTS polydiacetylene crystal spectraChemical Physics Letters, 1978
- The crystal structure of the low-temperature phase of poly[1,2-bis(p-tolylsulphonyloxymethylene)-1-buten-3-ynylene]Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1977
- Optical properties of bis (p-Toluene Sulphonate) diacetylene ii. low-temperature spectraPhysica Status Solidi (a), 1977
- Optical Nonlinearities in One-Dimensional-Conjugated Polymer CrystalsPhysical Review Letters, 1976