Photoinduced properties of Bis-azo chromophore host guest systems-birefringence and all optical tuneable polymer waveguide Bragg gratings

Abstract

The photoinduced properties of recently synthesised and reported bis-azo dyes doped host-guest polymer films were investigated. The photochromic properties and photoinduced birefringence were characterised. The birefringence was found to be very stable, and 96% of the birefringence was retained after illumination of the films was stopped. The high two photon absorption cross section (1251GM) together with stable photoinduced birefringence makes these materials promising candidates for 3D optical storage. The reported photochromic properties were subsequently used to design and manufacture an all optical integrated device. A waveguide Bragg grating was fabricated, and the Bragg wavelength was controlled over 600 pm by the intensity dependence of the refractive index of the photochromic material.

Tautomeric influence on the photoinduced birefringence of 4-substituted phthalimide 2-hydroxy Schiff bases in PMMA matrix

“…This phenomenon could be associated with the presence of the memory effect [58]. The obtained results allow a comparison to be made with the birefringence behaviour of most used azo-polymers or azo dyes embedded in a polymer matrix [59]. Recently, Schab-Balcerzak and co-workers have synthesized and investigated several azobenzene poly(amide imide)s [60] and azobenzene poly(esterimide)s [61] in terms of their photoanisotropic behaviour [62,63].…”

Multiple Azoarenes Based Systems – Photoswitching, Supramolecular Chemistry and Application Prospects

“…Calculation of energy of the inter‐valence band of tris‐azobenzene A‐21 radicals showed that the electronic coupling between consecutive charge‐bearing azobenzene units is more than the bis‐azobenzene radicals studied. Photo‐induced birefringence of different linear, non‐linear and core‐based bis‐azo chromophores A‐22 , [24a] A‐23 [24b] and A‐24 , [24c] doped within host‐guest polymer films, were explored and in some cases, utilized for manufacturing an all‐optical integrated device (Figure 5). Hecht, Grill and co‐workers deposited bis‐azobenzenes A‐16 and A‐25 , with electronically coupled and decoupled arrangements of azo units, on Au surface [25a] .…”

Effect of 2-Methylthiazole Group on Photoinduced Birefringence of Thiazole-Azo Dye Host–Guest Systems at Different Wavelengths of Irradiation

“…In the last decades, light-responsive molecules have been of interest in many applications, such as optical data storage, optical switches, optical memory, etc., [ 1 , 2 , 3 , 4 ].…”