TY - JOUR
T1 - Photorefractive properties and applications of polymer composites and fully functionalized polymethacrylates
AU - Hendrickx, Eric
AU - Van Steenwinckel, David
AU - Engels, Christiaan
AU - Gubbelmans, Elke
AU - Van den Broeck, Kurt
AU - Beljonne, David
AU - Brédas, Jean Luc
AU - Samyn, Celest
AU - Persoons, André
N1 - Funding Information:
E.H. is a postdoctoral fellow and D.V.S. is a research assistant of the Fund for Scientific Research-Flanders (Belgium) (FWO). E.G. and C.E. are research fellows from the IWT. D.B. is a research fellow of the Belgian National Fund for Scientific Research (FNRS). This research was supported by research grants from the FWO (G.0308.96, 1.5.009.99), the University of Leuven (GOA/95/01), and the Belgian Government. The collaboration between the Universities of Leuven and Mons is conducted in the framework of the Belgian Federal Government Inter-University Attraction Pole-IUAP P4/11.
PY - 2001
Y1 - 2001
N2 - We have studied the photorefractive properties of (2,4,7-trinitro-9-fluorenylidene)malononitrile (TNFM) sensitized poly(N-vinyl-carbazole) (PVK)/N-ethylcarbazole (ECZ) polymer composites doped with two structurally related chromophores. Characterization included four-wave mixing experiments, two-beam coupling and photoconductivity measurements at a wavelength of 780 nm. At an applied field of 48 V/μm, we have observed complete internal diffraction and gain coefficients exceeding 120 cm-1. A small alteration in the chromophore donor group substituents was used to tune the ionization potential of the dopant dye. This affected the grating build-up time and photorefractive phase shift. As an application, we demonstrate the operation of a photorefractive novelty filter using a 120-μm-thick sample. The performance of the polymer composites is compared to that of three newly synthesized polymethacrylates functionalized with carbazole, a dodecyl chain as an internal plasticizer and three different dyes. Here, we have observed net two-beam coupling gain and a diffraction efficiency of 60% at 58 V/μm.
AB - We have studied the photorefractive properties of (2,4,7-trinitro-9-fluorenylidene)malononitrile (TNFM) sensitized poly(N-vinyl-carbazole) (PVK)/N-ethylcarbazole (ECZ) polymer composites doped with two structurally related chromophores. Characterization included four-wave mixing experiments, two-beam coupling and photoconductivity measurements at a wavelength of 780 nm. At an applied field of 48 V/μm, we have observed complete internal diffraction and gain coefficients exceeding 120 cm-1. A small alteration in the chromophore donor group substituents was used to tune the ionization potential of the dopant dye. This affected the grating build-up time and photorefractive phase shift. As an application, we demonstrate the operation of a photorefractive novelty filter using a 120-μm-thick sample. The performance of the polymer composites is compared to that of three newly synthesized polymethacrylates functionalized with carbazole, a dodecyl chain as an internal plasticizer and three different dyes. Here, we have observed net two-beam coupling gain and a diffraction efficiency of 60% at 58 V/μm.
KW - Novelty filter
KW - Photorefractive polymers
KW - Real-time holography
UR - https://www.scopus.com/pages/publications/0035577624
UR - https://www.scopus.com/pages/publications/0035577624#tab=citedBy
U2 - 10.1016/S0928-4931(01)00354-X
DO - 10.1016/S0928-4931(01)00354-X
M3 - Article
AN - SCOPUS:0035577624
SN - 0928-4931
VL - 18
SP - 25
EP - 35
JO - Materials Science and Engineering C
JF - Materials Science and Engineering C
IS - 1-2
M1 - 620
ER -