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Dynamics of Exciton Reflection Spectra on the Change of the Incidence Angle in NaI Crystals
Author(s) -
O'ConnelBronin A. A.,
Treshchalov A. B.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221540235
Subject(s) - exciton , spectral line , reflection (computer programming) , absorption spectroscopy , line (geometry) , absorption edge , physics , transverse plane , optics , absorption (acoustics) , total internal reflection , scattering , atomic physics , condensed matter physics , band gap , quantum mechanics , geometry , mathematics , structural engineering , engineering , computer science , programming language
Over about sixty‐year investigations of the intrinsic absorption edge of NaI its absorption (reflection) spectra have been worked out in detail, but they have a „static” character, which is one of the reasons that made their interpretation difficult. In the present work, reflection spectra at oblique incidence, including a nearly sliding one are experimentally investigated, which allows to trace their dynamics and to analyse their peculiarities from a new point of view. Thanks to that the energy of the longitudinal exciton and respectively that of the longitudinal‐transverse splitting are estimated. The structure of the high‐energy side of the n = 1 exciton line first observed by Van Sciver is analysed.