PHOTOINDUCED BIDIRECTIONAL PHASE-TRANSITIONS IN POLYDIACETYLENE SINGLE-CRYSTALS

Authors
KOSHIHARA S SEGAWA Y TOKURA Y KODA T TAKEDA K
Citation
S. Koshihara et al., PHOTOINDUCED BIDIRECTIONAL PHASE-TRANSITIONS IN POLYDIACETYLENE SINGLE-CRYSTALS, Synthetic metals, 55(1), 1993, pp. 103-108
Citations number
3
Categorie Soggetti
Physics, Condensed Matter","Metallurgy & Mining
Journal title
Synthetic metals → ACNP
ISSN journal
03796779
Volume
55
Issue
1
Year of publication
1993
Pages
103 - 108
Database
ISI
SICI code
0379-6779(1993)55:1<103:PBPIPS>2.0.ZU;2-K
Abstract
We report the occurrence of a unique photo-induced phenomenon in conju gated polymers: reversible photo-induced phase transitions in single c rystals of polydiacetylene (PDA). The dependence of phase conversion e fficiency on the excitation photon energy shows that the photo-generat ion of charge-carriers (polarons), rather than excitons, is responsibl e for this macroscopic phase change. The possible dynamics of this unc onventional phenomenon in the nanosecond time-domain is discussed.