Polymer thin films containing Eu(III) complex as lanthanide lasing medium

Abstract

Direct evidence of lanthanide(III) lasing using Eu(III) complex in polymer thin films (threshold level <0.05 mJ) is reported. The thin film consists of polystyrene containing Eu(III) complexes based on two criteria: (1) Higher emission quantum yield of Eu(III) complexes, which increases the rs (energy density), and (2) faster radiation rate at large B (Einstein coefficient). The microcavity was constructed by coating a glass substrate with a film having a high refractive index. The film thickness was found to be 1.71 mm. The threshold level for laser transmission was found to be <0.05 mJ.

High lasing oscillation efficiency of Eu(III) complexes having remarkably sharp emission band

“…We are now examining lasing properties of those series of Eu(III) complexes in relation with stimulated emission cross-section [16]. Since the stimulated emission cross-section of 2 is the same order as the values of Nd-glass laser for practical use ((1.6-4.5) × 10 −20 cm 2 ) [8], the luminescent materials using 2 are promising for application such as the high-power laser medium.…”

Absorption cross-section control of Eu(III) complexes for increase of amplified spontaneous emission excited by third harmonic of nanosecond Nd:YAG laser

“…Koike has introduced the possibility of organic fiber laser systems using Eu(III) complexes incorporated organic optical fibers of polymethylmethacrylate (PMMA) [4]. We have also reported that strong luminescent Eu(III) complexes showed amplified spontaneous emission (ASE) from Eu(III) complexes in polymer thin-film micro-cavities by using a polyphenylsilsesqioxane (PPSQ) [5,6]. Furthermore, Kido has studied that dielectric sphere systems containing Eu(III) complexes performed efficient ASE by using smaller excitation energy for laser oscillation [7].…”

Listening to Lanthanide Complexes: Determination of the Intrinsic Luminescence Quantum Yield by Nonradiative Relaxation

“…These characteristics enable them to have wide application in responsive luminescent stains for biomedical analysis with temporal and spectral discrimination, [1][2][3][4][5][6][7][8][9] and to find use in development for liquid-crystal displays, [10][11][12][13] laser materials [14][15] and optoelectronic emitters. [16][17] Generally, the excellent luminescence properties of lanthanide complexes are attributed to the intramolecular energy transfer between the organic ligands and chelated metal ("antenna effect").…”