Molecular beam epitaxial growth and characterization of (001) Hg1-xCdxTe-HgTe superlattices

Charles R. Becker; V. Latussek; H. Heinke; M. M. Regnet; F. Goschenhofer; S. Einfeldt; Li He; E. Bangert; M. M. Kraus; Gottfried Landwehr

doi:10.1117/12.164937

7 December 1993 Molecular beam epitaxial growth and characterization of (001) Hg1-xCdxTe-HgTe superlattices

Charles R. Becker, V. Latussek, H. Heinke, M. M. Regnet, F. Goschenhofer, S. Einfeldt, Li He, E. Bangert, M. M. Kraus, Gottfried Landwehr

Author Affiliations +

Proceedings Volume 2021, Growth and Characterization of Materials for Infrared Detectors; (1993) https://doi.org/10.1117/12.164937
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

The molecular beam epitaxially growth of (001) Hg_1-xCd_xTe-HgTe superlattices has been systematically investigated. The well width as well as the period were determined directly by X-ray diffraction. This was accomplished for the well width by exploiting the high reflectivity from HgTe and the low reflectivity from CdTe for the (002) Bragg reflection. Knowing the well and barrier thicknesses we have been able to set an upper limit on the average composition of the barriers, x_b, by annealing the superlattice and then measuring the composition of the resulting alloy. x_b was shown to decrease exponentially with decreasing barrier width. x_b is appreciably smaller in narrow barriers due to the increased significance of interdiffusion in the Hg_1-xCd_xTe/HgTe interface in narrow barriers. The IR photoluminescence was investigated at temperatures from 4.2 to 300 K. Pronounced photoluminescence was observed for all superlattices in this temperature range.

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Charles R. Becker, V. Latussek, H. Heinke, M. M. Regnet, F. Goschenhofer, S. Einfeldt, Li He, E. Bangert, M. M. Kraus, and Gottfried Landwehr "Molecular beam epitaxial growth and characterization of (001) Hg1-xCdxTe-HgTe superlattices", Proc. SPIE 2021, Growth and Characterization of Materials for Infrared Detectors, (7 December 1993); https://doi.org/10.1117/12.164937

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