In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 33, No. 1R ( 1994-01-01), p. 193-
Abstract:
The real ( ε 1 ) and imaginary ( ε 2 ) parts of the dielectric function, ε ( E )= ε 1 ( E )+ i ε 2 ( E ), of PbTe have been measured by spectroscopic ellipsometry (SE) in the 1.15–5.4 eV photon-energy range at room temperature. The measured SE spectra reveal distinct structures at energies of E 1 , E 2 and E 3 critical points. These data are analyzed using two theoretical models, namely, the model dielectric function (MDF) and standard critical-point (SCP) model. It is found that the SCP model can provide a satisfactory fit to the second derivatives of ε ( E ) spectra [ d 2 ε ( E )/ d E 2 ], but does not yield good fits to ε ( E ) spectra. The MDF, on the other hand, results in excellent agreement with the experimental data for both ε ( E ) spectra and their derivatives. Dielectric-related optical constants, such as the complex refractive index ( n * = n + i k ), absorption coefficient (α) and normal-incidence reflectivity ( R ), of PbTe are also presented.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1994
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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