A chemically driven visible laser transition using fastnear-resonant energy transfer |
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Authors: | Woodward JR Cobb SH Shen K Gole JL |
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Affiliation: | High Temp. Lab., Georgia Inst. of Technol., Atlanta, GA; |
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Abstract: | Evidence is obtained which demonstrates the potential for developing purely chemical visible lasers based on rapid near-resonant energy transfer from metastable excited triplet states of germanium and silicon monoxide (a3Σ+,b 3Π) to select metal atoms. In this study, the Group IIIA metal atoms were chosen as the energy receptors for the energy transfer-pump sequence. Excited triplet states were generated from the Ge-O3, Ge-N2, Si-N2O, and Si-NO2 reactions; the bulk of the experimental results was obtained with a germanium-based system. The energy stored in the long-lived triplet states is transferred to pump X2P1/2 thallium, indium, and gallium atoms to their lowest lying 2 S1/2 states. The authors observe a system of temporal behavior which suggests the creation of a population inversion producing a gain condition and forming the basis for full cavity oscillation on the Tl 72S1/2-6P 3/2 transition at 535 nm |
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