Premium
Optical absorption in Hg Te
Author(s) -
Szuszkiewicz W.
Publication year - 1977
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.2220790236
Subject(s) - absorption (acoustics) , attenuation coefficient , range (aeronautics) , atomic physics , wavelength , chemistry , physics , materials science , molecular physics , optics , composite material
Abstract Optical absorption in intrinsic HgTe is measured in the wavelength range 2.0 to 25 μm at tem peratures from 10 to 295 K. The Γ 6 Γ 8 transitions are observed at low temperatures. The ab‐ sorption coefficient is theoretically calculated using Kane's formulae for inverted band structure. The results of the calculations based both on the complete Kane theory and on the approximation of large spin‐orbit splitting are obtained. It is shown that the latter approximation does not describe well experimental absorption data. The agreement between the experimental results and the theoretical curves which are based on the complete Kane theory with the reasonable values of band structure parameters is much better. However, for energies greater than 0.35 eV small discrepancy is observed. This discrepancy increases with the energy.