Photoinduced polarization inversion of excitons in conjugated polymer films | Zendy

Rouli Fu | Zendy; Junhao Chu | Zendy; Weimin Zheng | Zendy; GuangYu Guo | Zendy; Xin Sun | Zendy

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Photoinduced polarization inversion of excitons in conjugated polymer films

Author(s) -

Rouli Fu,

Junhao Chu,

Weimin Zheng,

GuangYu Guo,

Xin Sun

Publication year - 2000

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.408368

Subject(s) - exciton , polarization (electrochemistry) , conjugated system , materials science , ultrashort pulse , optoelectronics , polymer , biexciton , optics , condensed matter physics , photoluminescence , physics , chemistry , laser , composite material

The study shows that, in a conjugated polymer, there exists a novel photo-induced phenomenon: a photo-induced polarization inversion, when a single-exciton is photoexcited and becomes a bi-exciton. The reason is that, in a conjugated polymer, a single-exciton displays normal polarization, whereas a bi-exciton exhibits negative polarization. The physical significance of negative polarization is explored. Photo-induced polarization inversion is an ultrafast switching process, which could be used to make photo-induced ultrafast switch devices.

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