15 February 2018 Re-absorption and nonradiative energy transfer in vibronic laser gain media
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Abstract
Fe:ZnSe and other transition metals have broad upper and lower energy manifolds which give rise to broad absorption and fluorescence bands in the mid-IR spectral region. Energy transfer between Fe2+ ions via re-absorption of fluorescence (due to the spectral overlap of these bands) and phonon-assisted energy transfer (due to the lattice dynamics of ZnSe) becomes more probable with increasing Fe2+ concentration. Here we treat these processes as additional terms in the rate equations which govern the spontaneous decay of the Fe2+ ion. This treatment gives insight into anomalous behavior seen in the thermal lifetime of the Fe:ZnSe system. We also apply the model to other transition metal doped II-VI materials.
Conference Presentation
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Jonathan W. Evans, Jonathan W. Evans, Thomas R. Harris, Thomas R. Harris, Eric J. Turner, Eric J. Turner, Martin M. Kimani, Martin M. Kimani, J. Matthew Mann, J. Matthew Mann, Ronald W. Stites, Ronald W. Stites, Gary Cook, Gary Cook, Kenneth L. Schepler, Kenneth L. Schepler, } "Re-absorption and nonradiative energy transfer in vibronic laser gain media", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105110I (15 February 2018); doi: 10.1117/12.2290822; https://doi.org/10.1117/12.2290822
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