FREE-CARRIER ABSORPTION OF HG1-XCDXTE EPITAXIAL FILMS

Free‐carrier absorption (FCA) of Hg1−xCdxTe epitaxial films is analyzed by considering the composition‐in‐depth nonuniformity of epilayers. The results show that epilayers exhibit different FCA behavior from bulk materials. Based on the analyses, the carrier concentration, the density and size distribution of Te precipitates, as well as the inclusion in Hg1−xCdxTe epilayers are derived from fitting the measured FCA spectra.

[1]  R. Yadava,et al.  Precipitation in CdTe crystals studied through mie scattering , 1994 .

[2]  L. Colombo,et al.  Electrical Characterization of Liquid-Phase Epitaxially Grown Single-Crystal Films of Mercury Cadmium Telluride by Variable-Magnetic-Field Hall Measurements , 1994 .

[3]  P. Boyd,et al.  Overview of compositional measurement techniques for HgCdTe with emphasis on IR transmission, energy dispersive X-ray analysis and optical reflectance , 1993 .

[4]  Junhao Chu,et al.  Band‐to‐band optical absorption in narrow‐gap Hg1−xCdxTe semiconductors , 1992 .

[5]  H. Kissel,et al.  Optical absorption of thin Hg1-xCdxTe epitaxial layers , 1991 .

[6]  J. Tian,et al.  Anomalous Hall effect and the anomalous infrared absorption in n‐type bulk Hg0.8Cd0.2Te , 1991 .

[7]  C. A. Hougen,et al.  Model for infrared absorption and transmission of liquid‐phase epitaxy HgCdTe , 1989 .

[8]  F. Bartoli,et al.  Characterization of impurities in p‐type HgCdTe by photo‐Hall techniques , 1986 .

[9]  Qian Dingrong.  Below-gap absorption and precipitation in n-type Hg1−xCdxTe , 1986 .

[10]  D. F. Weirauch,et al.  Inhomogeneity model for anomalous Hall effects in n‐type Hg0.8Cd0.2Te liquid‐phase‐epitaxy films , 1985 .

[11]  F. Raymond,et al.  Infrared optical absorption: A characterization tool in Cd rich p-type Hg1−xCdxTe , 1985 .

[12]  J. Tregilgas,et al.  Precipitation of tellurium in (Hg, Cd)Te alloys , 1983 .

[13]  J. Mroczkowski,et al.  Optical absorption below the absorption edge in Hg1−xCdxTe , 1983 .

[14]  J. Tregilgas,et al.  Precipitation and phase stability of (Hg,Cd)Te , 1982 .

[15]  R. Baltz,et al.  Quantum Theory of Free Carrier Absorption , 1972 .

[16]  Hatsuo Kimura,et al.  Free-Carrier Infrared Absorption and Determination of Deformation-Potential Constant in n-type InSb , 1963 .

[17]  R. S. Caldwell,et al.  Optical Properties of Tellurium and Selenium , 1959 .

[18]  N. V. Shevchenko,et al.  IR optical absorption and reflection spectra in narrow gap semiconductors , 1990 .

[19]  A. Šileika,et al.  Infrared absorption spectra of Cd0.2Hg0.8Te crystals , 1983 .