AG Fröhlich
)91729-4 Two-photon excited luminescence of trigonal selenium . JOURNAL OF LUMINESCENCE 12 , 605-610 (1976) D. Fröhlich, B. Moreth, H. Büttner, and J. Treusch DOI: 10.1016/0022-2313(76)90148-4 Two-Photon [...] Fröhlich, B. Uebbing, T. Willms, and R. Zimmermann Proc. of DPC 1993 DOI: 10.1016/0022-2313(94)90401-4 1993 Determination of deformation potentials by three-photon piezoabsorption of paraexcitons in KI [...] O . V. Langer, H. Stolz, W. von der Osten, D. Fröhlich, A. Kulik, and B. Uebbing XVII IQEC Conf. MoH4 (1992) Two-Photon Spectroscopy of Excitons in ZnTe Under Uniaxial Stress . EUROPHYSICS LETTERS 17 , …