Laser materials, europium chelates

In 1962, it was pointed out that europium complexes dissolved in organic solvents or in a polymer matrix have optical properties that make them potential candidates for laser materials. At the same time. Whan and Crosby and Filipescu and coworkers have also suggested the potential application of rare-earth chelates in lasers. Lempicki and Samelson in 1963 were the first researchers to obtain stimulated emission at... 

D. L. Ross and J. Blanc, Europium Chelates as Laser Materials, in Lanthanide/Actinide Chemistry, Advances in Chemistry Series (Ed. R. E. Gould), Vol. 71, Am. Chem. Soc., Washington, 1967, p. 155. 

Ross, D. L., Blanc, J., Europium Chelates as Laser Materials, Adv. Chem. 

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