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Metamorphic in Asy P1-y (y=0.30-0.75) and Alδ In1-δ Asy P1-y buffer layers on InP substrates

Steven S. Bui*, Henry P. Lee*, Kin Man Yu

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

The authors report the growth and characterization of In Asy P1-y and Alδ In1-δ Asy P1-y buffer layers on InP by metal-organic vapor phase epitaxy. Under optimized growth conditions, they achieved sheet resistances of 2.8× 105 and 4.8× 104 /sq for single layer In As0.44 P0.56 (0.5 μm) and step-graded In As0.75 P0.25 In As0.42 P0.58 (0.0750.5 μm) layers, respectively. A bowing parameter for In Asy P1-y of -0.22 eV is found based on photoreflectance measurement. When 0.5 μm thick Al0.11 In0.89 As.62 P.38 is grown, they obtain sheet resistance and sheet carrier concentration of 7.76× 105 /sq and 7.92× 109 cm-2, respectively. This opens interesting possibilities for realizing high-performance metamorphic field-effect transistors based on strained InAs or In Asy P1-y (0.5
Original languageEnglish
Article number212113
JournalApplied Physics Letters
Volume90
Issue number21
DOIs
Publication statusPublished - 2007
Externally publishedYes

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