Issue |
Europhys. Lett.
Volume 45, Number 4, February II 1999
|
|
---|---|---|
Page(s) | 456 - 462 | |
Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
DOI | https://doi.org/10.1209/epl/i1999-00188-3 | |
Published online | 01 September 2002 |
Nonlinear optical response of a novel polydiacetylene poly(1,4 bis(3-quinolyl)-1,3 butadyne): Role of exciton-phonon interaction
1
Department of Physics,
Indian Institute of Technology - Bombay, 400 076,
India
2
Department of Chemistry,
Indian Institute of Technology - Bombay, 400 076,
India
Received:
22
June
1998
Accepted:
10
December
1998
A model incorporating the exciton-phonon interaction for a quantitative
description of the third-order nonlinear optical response of a
one-dimensional conjugated polymer chain in the vicinity of a one-photon
resonance is proposed. This model has been used to describe our
observations on the dispersion of the second molecular
hyperpolarizability, , of poly(1,4 bis(3-quinolyl))-1,3 butadyne in the
spectral range 720–810 nm satisfactorily. The large observed
precipitous enhancement close to the absorption tail could not be
explained by the essential states models. It is found that the phonon-mediated
shift of the exciton resonance is responsible for the large
monotonic variation of
, whilst the phase space filling
effect renders
its self-defocusing character.
PACS: 42.65.An – Optical susceptibility, hyperpolarizability / 71.35.Lk – Collective effects (Bose effects, phase space filling, and excitonic phase transitions) / 71.35.Aa – Frenkel excitons and self-trapped excitons
© EDP Sciences, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.