The search for new materials for laser systems, which would extend the spectral range of the lasers is one of the priorities of modern material science. And one of the promising areas of this investigations is the development of new active materials for vibronic lasers [1,2,3]. A broad band of tuning range so-called "vibronic" lasers is determined by features of the energy spectrum of activator in chalcogenide matrix. This feature determines the broad band luminescence in ZnSe matrix in a range 2-3 mmdoped Cr²⁺ and 4-5.5 mm for the Fe²⁺ [2]. The further development directions of the laser physics is to improve both the performance of well-known materials and searching for new matrices, which have a decisive influence on the energy spectrum of the active ions. This article presents the research results of semiconductor single crystals of substitution solid solution Zn_1-xMn_xS doped with Fe²⁺ ions.

Using the method of Vickers microhardness testing are measured the microhardness of a hexagonal Zn_1-xMn_xS:Fe²⁺ single crystals grown at an overpressure excessive pressure of inert gas in graphite crucibles (vertical Bridgman). The measurements were performed on samples with different concentrations of manganese in the load range from 0.25N to 2N. Indentation was performed on close-packed planes and the cleavage planes of these crystals. The obtained dependences are characterized by the type I and II microhardness anisotropy and defined the corresponding coefficients of anisotropy. Obtained microhardness values were compared with the corresponding values for the ZnS single crystals.

The spectra of the optical transmission of single crystalsZn_1-xMn_xS:Fe²⁺ in the visible, near-and mid-IR ranges are obtained. Investigated and explained the differences in the optical spectra of ZnS:Fe²⁺ crystals. The dependence of the position of the absorbance maximum of Fe²⁺ ions on the concentration of manganese in the studied samples are established.

1.        I. T. Sorokina. Cr²⁺-doped II–VI materials for lasers and nonlinear optics. Optical Materials 26(4), 395–412 (2004).

2.        Sergey Mirov, Vladimir Fedorov, Igor Moskalev, Dmitri Martyshkin, Changsu Kim. Laser & Photon. Rev. 4, No. 1, 21–41 (2010)

3.        Zagoruiko Yu.A., Kovalenko N.O., PuzikovV.M., Fedorenko O.A., BasievT.T., Doroshenko M.E., OsikoV.V., Jelinkova H., KorandaP. Functional Materials 16, No.3 (2009).

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1. ZnWO₄ films obtained by ion–beam sputtering and hydrothermal method