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Proceedings Paper

Direct MBE growth of HgCdTe(112) IR detector structures on Si(112) substrates
Author(s): Terence J. de Lyon; Rajesh D. Rajavel; Owen K. Wu; Scott M. Johnson; Charles A. Cockrum; G. M. Venzor
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Paper Abstract

Molecular-beam epitaxy (MBE) has been utilized to deposit single crystal epitaxial films of CdTe(112)B and HgCdTe(112)B directly onto Si(112) substrates without the use of GaAs interfacial layers. The films have been characterized with x-ray diffraction and wet chemical defect etching, and IR detectors have been fabricated and tested. CdTe(112)B films are twin- free and have x-ray rocking curves as narrow as 72 arc-seconds and near-surface etch pit density (EPD) of 2 X 106 cm-2 for 8 micrometers -thick films. HgCdTe(112)B films deposited on Si substrates have x-ray rocking curve FWHM as low as 92 arc-seconds and EPD of 8 - 30 X 106 cm-2. HgCdTe/Si infrared detectors have been fabricated with R0A equals 4.3 X 103 (Omega) -cm2 (f/2 FOV) and 7.8 micrometers cutoff wavelength at 78 K to demonstrate the capability of MBE for growth of large-area HgCdTe arrays on Si.

Paper Details

Date Published: 1 September 1995
PDF: 10 pages
Proc. SPIE 2554, Growth and Characterization of Materials for Infrared Detectors II, (1 September 1995); doi: 10.1117/12.218189
Show Author Affiliations
Terence J. de Lyon, Hughes Research Labs. (United States)
Rajesh D. Rajavel, Hughes Research Labs. (United States)
Owen K. Wu, Hughes Research Labs. (United States)
Scott M. Johnson, Santa Barbara Research Ctr. (United States)
Charles A. Cockrum, Santa Barbara Research Ctr. (United States)
G. M. Venzor, Santa Barbara Research Ctr. (United States)


Published in SPIE Proceedings Vol. 2554:
Growth and Characterization of Materials for Infrared Detectors II
Randolph E. Longshore; Jan W. Baars; Avishai Kepten; John M. Trombetta, Editor(s)

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