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We show lasing (with the threshold of μJ order) due to morphology-dependent resonances (MDRs) from solid polystyrene spheres with volume-distributed europium (Eu) chelates. Lasing spectra depending on MDRs are reported, and a practical usefulness of the Eu chelate laser with the solid spheres is described compared with the previous one with liquid spheres.
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Taniguchi et al. (1995) studied this question.
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