A method for studying the multipolarity and orientation of elementary oscillators in cubic crystals on the basis of axially periodic dependence of the luminescence intensity

A new method for determining the multipolarity and orientation of elementary quantum oscillators in cubic crystals is proposed. This method is based on studying the spatially periodic dependences of the intensity of luminescence observed in crystals with an induced anisotropy. The method was experimentally verified on LiF crystals containing F 2 and F 3 + color centers. It is shown that the observed spatially periodic dependences are in good agreement with the calculated dependences. The proposed method supplements the known methods for studying polarized luminescence (the methods of azimuthal dependences and polarization ratios and their various modifications). However, the new method, in contrast to the known ones, does not require measurements of the polarization ratios (for example, the degree of luminescence polarization), which in some cases significantly simplifies the experiment. Another advantage of the proposed method is its universality; i.e., it can be applied with equal success to both anisotropic and cubic crystals.