Dispersion of the refractive index of epitaxial Pb{sub 1-x}Eu{sub x}Te (0 {<=} x {<=} 1) alloy layers below the absorption edge

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Semiconductors

DOI:https://doi.org/10.1134/S1063782611080148· OSTI ID:22004765

Selivanov, Yu G; Chizhevskii, E G ^[1]; Stavrovskii, D B ^[2]; Zasavitskiy, I I ^[1]

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1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
2. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)

The transmittance spectra of epitaxial Pb{sub 1-x}Eu{sub x}Te (0 {<=}x {<=} 0.1) alloy layers are exploited to study the dispersion of their refractive index in the spectral range from 650 to 8000 cm{sup -1} (below the absorption edge). The refractive index and the position of the absorption edge as functions of the composition parameter of the alloys are determined at two temperatures, 80 and 295 K. The refractive index is calculated in the context of the classic wave concepts of propagation of electromagnetic radiation. The experimentally determined dispersion dependences are described by the empiric Sellmeier expression of the second order. From analysis of the transmittance of the layers, it follows that the band gap of the epitaxial Pb{sub 1-x}Eu{sub x}Te alloys increases with increasing temperature at x < 0.5 and decreases at x > 0.5.

• OSTI ID: 22004765
• Journal Information: Semiconductors, Journal Name: Semiconductors Journal Issue: 8 Vol. 45; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ALLOYS
DISPERSIONS
ELECTROMAGNETIC RADIATION
EPITAXY
LAYERS
REFRACTIVE INDEX
SPECTRA