| Abstract: | The mechanism of formation of an exciton reflection band is analyzed using a multilayer model of the near-surface region of
ZnSe single crystals. It is shown that the appearance of a fine structure (a spike) in the reflection spectra at large damping
parameters of the exciton is due to the surface electric field and the Stark exciton effect. The exciton-resonance energies
and the damping parameters of free excitons for temperatures ranging from 12 to 100 K are determined by comparing experimental
and predicted contours of the reflection spectrum. The surface concentration of charged centers and the characteristics of
the space-charge region are evaluated within the framework of the model employed.
Brest Polytechnic Institute, 267, Moskovskaya Str., Brest, 224017, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii,
Vol. 66, No. 3, pp. 401–407, May–June, 1999. |
