Holographic recording on the basis of forbidden singlet-triplet electronic transitions

Photopolymer material sensitized by xanthene dyes for holographic recording using forbidden singlet–triplet electronic transitions

“…As triethylammonium salt of xanthene and thioxanthene dyes with different types and amounts of heavy atoms were used as sensitizers of photopolymer compositions [12]. Erythrosine and eosin salts were used as the reference dye- sensitizers, studied earlier [7,14]. Dye-sensitizer structures are shown in figure 2 and table 1.…”

“…The initial photopolymers described in section 2.2 have a concentration of key components selected on the basis of the preliminary data [6,7,13]. However, hologram recording using dye-sensitizer singlet-triplet transitions demands the specific optimal concentrations of key components.…”

“…One way to solve this problem is to use forbidden singlet-triplet electron transitions of dyes for holographic recording. Previously, the use of this mode of excitation of dye-sensitizer for the recording of holographic gratings in photopolymer layers was also shown [7]. Electronic transitions in molecules between terms of different multiplicity are known, but the use of this phenomenon in photochemistry is not widespread because of small values of extinction coefficients of these transitions [8].…”