The improvement in the diffraction efficiency of polymer using ionic liquid

Sung Ho Kim, Pankaj Attri, In Tae Kim


In this study, the photosensitive materials for information storage devices are presented. The polymers were prepared using surface relief-grating (SRG) fabrication with a diode-pumped solid-state (DPSS) laser of 532 nm, and the diffraction efficiency (DE) of the polymer is assessed with a low-power DPSS laser at 633 nm. However, the diffraction efficiency of the azo-functionalized epoxy-based polymer is low, even after 15 min of exposure. To improve the efficiency and reduce the time it takes for the DE measurements of the photosensitive polymer, we combined the polymer and the ionic liquids (ILs). We investigated various ILs, such as 1-methylimidazolium chloride ([Mim]Cl) from the imidazolium family IL and diethylammonium dihydrogen phosphate (DEAP), triethylammonium 4-aminotoluene-3-sulfonic acid (TASA) and tributylmethylammonium methyl sulfate (TBMS) from ammonium family ILs. For the first time, we observed that DE has dramatically increased the DEAP-polymer mixture in 4 min compared to polymer (alone) and other polymer-IL mixtures. Therefore, DEAP IL can help improve the efficiency of the DE measurements in less time.


photosensitive materials; diode-pumped solid-state; diffraction efficiency; ionic liquids; imidazolium IL; ammonium IL

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