Dynamic Holographic Imaging Using Photorefractive Polymers Based on a Boronate-Derivative Nonlinear Chromophore

Abstract

We report dynamic holographic imaging with organic photorefractive polymer composites, doped with the electro-optic chromophore (2-(p-chlorophenyl)-(3′-nitrobenzo[d])-(4′′-methoxybenzo[h])-1,3-dioxa-6-aza-2-boracyclonon-6-ene, a push-pull molecule derived from a new class of boronates. The composites are based on the photoconductor poly(9-vinylcarbazole) (PVK) as the polymer matrix, and 9-ethylcarbazole (ECZ) as the plasticizer, with the fullerene C 60 as sensitizer. A tilted four-wave mixing geometry was used to record and reconstruct two-dimensional test objects, using a 10 mW He – Ne laser (632.8 nm). The recording response time was less than one second for a light intensity of ≈350 mW/cm 2 in each writing beam. The erasing time had a similar value. These composites have been used for over one year with no appreciable signs of degradation or crystallization.

Recent Advances in BODIPY Compounds: Synthetic Methods, Optical and Nonlinear Optical Properties, and Their Medical Applications

“…Block copolymers featuring a relatively long PEO segment formed stable micellar solutions in water with luminescence characteristics similar to those of the respective (water-insoluble) homopolymers, suggesting potential applications as nanosized fluorophores in biological environments. Among other interesting O-B-N-containing organoboron compounds are the so-called "push-pull" type of molecules [106][107][108]. These compounds derive from the well-known stilbene backbone, to which an arylboron (ArB) fragment has been added.…”

“…Electric-field-induced second-harmonic measurements of the nonlinear optical response revealed that the nature of the phenyl-boron moieties has a modest influence on the molecular hyperpolarizabilities. Among other interesting O-B-N-containing organoboron compounds are the so-called "push-pull" type of molecules [106][107][108]. These compounds derive from the well-known stilbene backbone, to which an arylboron (ArB) fragment has been added.…”

“…Among other interesting O-B-N-containing organoboron compounds are the so-called “push–pull” type of molecules [ 106 , 107 , 108 ]. These compounds derive from the well-known stilbene backbone, to which an arylboron (ArB) fragment has been added.…”

Synthesis, crystal structure and non-linear optical properties of boronates derivatives of salicylideniminophenols

“…Compound 1a belongs to the orthorhombic space group Icab, 2b to the triclinic space group P 1 and 3b to the monoclinic C2/c. Boron 13 C NMR (ppm) and IR (cm À1 ) data for compounds 1-3, 1a-1c, 2a-2c and 3a-3d compounds 1a and 3b contain one crystallographically independent molecule while 2b has two independent molecules that show the same structure in the asymmetric unit. The bond distance observed in the dative N ?…”

“…The results suggest that modulation could be achieved by rotation of the phenyl around the boron-carbon bond. One of these boron chromophores has been used for NLO dynamic holographic imaging in photorefractive polymers [13].…”