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Titolo:
MOLECULAR-BEAM EPITAXIAL-GROWTH AND PERFORMANCE OF INTEGRATED MULTISPECTRAL HGCDTE PHOTODIODES FOR THE DETECTION OF MID-WAVE INFRARED RADIATION
Autore:
RAJAVEL RD; JAMBA DM; JENSEN JE; WU OK; WILSON JA; JOHNSON JL; PATTEN EA; KOSAI K; GOETZ P; JOHNSON SM;
Indirizzi:
HUGHES RES LABS,MS RL92,3011 MALIBU CANYON RD MALIBU CA 90265 SANTA BARBARA RES CTR GOLETA CA 93117
Titolo Testata:
Journal of crystal growth
, volume: 185, anno: 1998,
pagine: 1272 - 1278
SICI:
0022-0248(1998)185:<1272:MEAPOI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Keywords:
HGCDTE; MULTISPECTRAL DETECTORS; 2-COLOR DETECTORS; IN SITU DOPING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
R.D. Rajavel et al., "MOLECULAR-BEAM EPITAXIAL-GROWTH AND PERFORMANCE OF INTEGRATED MULTISPECTRAL HGCDTE PHOTODIODES FOR THE DETECTION OF MID-WAVE INFRARED RADIATION", Journal of crystal growth, 185, 1998, pp. 1272-1278

Abstract

In situ doped HgCdTe two-color detectors with the n-p-n geometry weregrown by molecular beam epitaxy, for the simultaneous detection of two closely spaced bands in the mid-wave infrared spectrum. The average near-surface etch pit densities in these layers were 5 x 10(6) cm(-2),which is a factor of 10 higher than that observed for the lattice-matched growth of Hg1-xCdxTe (x = 0.22) layer on Cd0.96Zn0.04Te substrates. The 0.04% lattice mismatch between the Hg1-xCdxTe (x = 0.35) epilayer and the Cd0.96Zn0.04Te substrate produces plastic deformation of the epilayer which results in an increased dislocation densities in the epilayer. The alloy composition across the device structure along the growth direction was determined by secondary ion mass spectrometric analysis, and deviated by less than 1% from the target. The device structures were processed as diodes with the mesa architecture and tested. The spectral response of the detectors at 77 K was characterized by sharp turn off at 3.7 and 4.4 mu m. R(0)A values in excess of 1 x 10(6) Omega cm(2) and quantum efficiencies greater than 75% were measured for diodes in each band. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 11:51:59