Photoinduced optical retardation in mesostructured dye-doped films investigated by an imaging pump-probe technique

I.-G. Marino; D. Delmonte; F. Pessini; P. P. Lottici; L. Cristofolini; J. García-Macedo; A. Franco; G. Valverde-Aguilar

doi:10.1364/JOSAB.26.000384

Photoinduced optical retardation in mesostructured dye-doped films investigated by an imaging pump-probe technique

I.-G. Marino, D. Delmonte, F. Pessini, P. P. Lottici, L. Cristofolini, J. García-Macedo, A. Franco, and G. Valverde-Aguilar

Journal of the Optical Society of America B
Vol. 26,
Issue 3,
pp. 384-389
(2009)
•https://doi.org/10.1364/JOSAB.26.000384

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I.-G. Marino, D. Delmonte, F. Pessini, P. P. Lottici, L. Cristofolini, J. García-Macedo, A. Franco, and G. Valverde-Aguilar, "Photoinduced optical retardation in mesostructured dye-doped films investigated by an imaging pump-probe technique," J. Opt. Soc. Am. B 26, 384-389 (2009)

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Related Topics
Table of Contents Category
- Materials
Optics & Photonics Topics
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The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Polarimetric imaging (110.5405)
- Anisotropic optical materials (160.1190)
- Optical storage materials (160.2900)
- Nanomaterials (160.4236)
- Photosensitive materials (160.5335)
- Birefringence (260.1440)

About this Article
History
- Original Manuscript: September 8, 2008
- Revised Manuscript: December 4, 2008
- Manuscript Accepted: December 15, 2008
- Published: February 4, 2009

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Abstract

The photoinduced optical retardation in mesostructured polymeric materials containing photo-orientable dyes has been investigated as a function of time and pump irradiance by an imaging pump-probe technique. The mesostructured samples show higher maximum retardation and lower residual anisotropy than amorphous ones. Several hypotheses are made to explain both results, taking into account the influence of the mesostructures on the chromophores. The retardation-irradiance curves measured in different samples are fitted against current available models.

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Name	Components
A1	PMMA:DR1
A2	PMMA:DR1:CTAB
A3	PMMA:DR1:SDS
B1	PMMA:DO3
B2	PMMA:DO3:CTAB
B3	PMMA:DO3:SDS

Model	$ρ (I, t_{MAX})$
Monoexp [10]	$a_{1} [1 - \exp (- a_{2} I)]$
Sekkat and Knoll [14]	$a_{1} [\exp (- a_{2} I t_{MAX}) - \exp (- a_{3} I t_{MAX})]$
Sajti et al. [15]	$a_{1} I ∕ [1 + t_{MAX} (a_{2} + a_{3} I)]$
Thieghi et al. [16]	$a_{1} [1 - a_{2} ∕ (a_{2} + a_{3} I)]$ $\times {1 - \exp [- (a_{2} + a_{3} I) t_{MAX}]}$
Fu et al. [17]	$[a_{1} a_{2} I ∕ (a_{2} I + a_{3})] [a_{4} ∕ (a_{4} + a_{5} I + a_{6})]$ $\times {1 - \exp [- (a_{2} I + a_{3}) t_{MAX}]}$ $\times {1 + [(a_{5} I + a_{6}) ∕ a_{4}]$ $\times \exp [- (a_{4} + a_{5} I + a_{6}) t_{MAX}]}$
Biexp	$a_{1} [1 - \exp (- a_{2} I)] + a_{3} [1 - \exp (- a_{4} I)]$

Model		A1	A2	A3	B1	B2	B3	Avg.
Monoexp [10]	RSS	0.707	1.532	4.493	0.176	0.883	0.651	1.407
Monoexp [10]	$R^{2}$	0.989	0.982	0.967	0.984	0.958	0.976	0.976
Sekkat and Knoll [14]	RSS	0.346	0.873	1.438	0.087	0.2	0.176	0.520
Sekkat and Knoll [14]	$R^{2}$	0.995	0.99	0.99	0.992	0.991	0.993	0.992
Sajti et al. [15]	RSS	0.143	0.454	1.815	0.068	0.39	0.227	0.516
Sajti et al. [15]	$R^{2}$	0.998	0.995	0.987	0.994	0.982	0.991	0.991
Thieghi et al. [16]	RSS	0.143	0.454	1.815	0.068	0.39	0.227	0.516
Thieghi et al. [16]	$R^{2}$	0.998	0.995	0.987	0.994	0.982	0.991	0.991
Fu et al. [17]	RSS	0.135	0.404	0.644	0.06	0.108	0.104	0.242
Fu et al. [17]	$R^{2}$	0.998	0.995	0.995	0.995	0.995	0.996	0.996
Biexp	RSS	0.084	0.205	0.138	0.054	0.063	0.088	0.105
Biexp	$R^{2}$	0.999	0.998	0.999	0.995	0.997	0.997	0.997

Name	Components
A1	PMMA:DR1
A2	PMMA:DR1:CTAB
A3	PMMA:DR1:SDS
B1	PMMA:DO3
B2	PMMA:DO3:CTAB
B3	PMMA:DO3:SDS

Model	$ρ (I, t_{MAX})$
Monoexp [10]	$a_{1} [1 - \exp (- a_{2} I)]$
Sekkat and Knoll [14]	$a_{1} [\exp (- a_{2} I t_{MAX}) - \exp (- a_{3} I t_{MAX})]$
Sajti et al. [15]	$a_{1} I ∕ [1 + t_{MAX} (a_{2} + a_{3} I)]$
Thieghi et al. [16]	$a_{1} [1 - a_{2} ∕ (a_{2} + a_{3} I)]$ $\times {1 - \exp [- (a_{2} + a_{3} I) t_{MAX}]}$
Fu et al. [17]	$[a_{1} a_{2} I ∕ (a_{2} I + a_{3})] [a_{4} ∕ (a_{4} + a_{5} I + a_{6})]$ $\times {1 - \exp [- (a_{2} I + a_{3}) t_{MAX}]}$ $\times {1 + [(a_{5} I + a_{6}) ∕ a_{4}]$ $\times \exp [- (a_{4} + a_{5} I + a_{6}) t_{MAX}]}$
Biexp	$a_{1} [1 - \exp (- a_{2} I)] + a_{3} [1 - \exp (- a_{4} I)]$

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Figures (5)

Tables (3)

Equations (1)

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