Binary and Ternary Optical Crystals ZnSe:Fe2+ and ZnMgSe:Fe2+ for Mid-IR Applications

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In this study, binary ZnSe:Fe²⁺ crystals and a concentration series of ternary Zn1-xMgxSe:Fe²⁺ (0 < x < 0.6) were grown using the vertical Bridgman method in graphite crucibles under high argon pressure. The influence of Mg incorporation on the structural perfection, electronic energy levels, and optical absorption/emission characteristics was systematically investigated. With increasing Mg content, a monotonic redshift of both absorption and luminescence bands was observed, which is attributed to modifications in the crystal field surrounding Fe²⁺ ions and to changes in the host lattice parameters. The correlation between composition, crystal structure, and optical response was analyzed to elucidate the mechanisms of Fe²⁺-related transitions. These results demonstrate the potential of Zn1-xMgxSe:Fe²⁺ as tunable mid-infrared laser media and provide guidelines for the compositional engineering of A²B⁶-based laser materials.

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Materials Science Forum (Volume 1179)

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3-11

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March 2026

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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