Effect of lanthanoid organometallic compounds on holographic storage characteristics of doped PQ/poly(hydroxyethyl methacrylate-co-methyl methacrylate) hybrids

Abstract

In this research, we fabricate and characterize lanthanide organometallic compounds and 9,10-phenanthrenequinone (PQ) co-doped poly(2-hydroxyethyl methacrylate-co-methyl methacrylate) photopolymers for holographic recording. Five different lanthanoid (Ce 3+ , Nd 3+ , Er 3+ , Yb 3+ and Lu 3+) organometallic compounds, one at a time, is co-doped with PQ in a poly(HEMA-coMMA) matrix, respectively. Holographic experiments demonstrate that lutetium organometallic compounds and a PQ co-doped poly(HEMA-coMMA) photopolymer can greatly enhance the volume holographic characteristics. The degree of improvement in hologram diffraction efficiency and the recording dynamic range for these co-doped photopolymers follows the order:

Nitroanilines enhancing the holographic data storage characteristics of the 9,10‐phenanthrenequinone‐doped poly(methyl methacrylate) photopolymer

“…The summation of the square roots of the diffraction efficiency as a function of the exposed energy forms a running curve of the cumulative grating strength (Figure 4). It can be expressed as where n is total number of holograms recorded for a total exposed energy density of E (J/cm 2 ) 3, 11, 12, 18. By curve fitting with the function the saturation value C sat (M#) of the curve gives the dynamic range of the material, and E t gives the exposed energy constant of the material 3, 18.…”

“…In previous studies, we have found that 9,10‐phenanthrenequinone (PQ)‐doped PMMA serves as an excellent holographic recording material 3, 10–12. The grating in such systems is formed through photoreactions, with the photoproduct featuring one methyl methacrylate (MMA) unit attached to one PQ derivative3; notably, however, the limited availability of PQ in the PMMA/PQ system restricts the dynamic range (M#) of holographic data storage.…”

Phenanthraquinone-Doped Polymethyl Methacrylate Photopolymer for Holographic Recording

“…In 2009, Yu-Fang Chen improved the holographic properties of PQ/PMMA polymers by introducing five different lanthanide metal–organic compounds [ 116 ] (Ce 3 + , Nd 3+ , Er 3+ , Yb 3+ , and Lu 3+ ). The experimental results showed that the doping of PQ/PMMA photopolymer systems by lanthanide metal–organic compounds could improve the material’s diffraction efficiency and dynamic range.…”