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Lattice parameter engineering for III-V long wave infrared photonics

  • Stony Brook University

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The design and fabrication of metamorphic periodic heterostructures containing InAsSb layers with controllable modulated Sb composition and well-regulated band alignments are reported. The bandgap energy of ordered alloy can be much smaller than that in bulk InAsSb with any Sb content. The modulation period is determined by the thicknesses of the strain compensated InAsSbx/InAsSby pairs grown on a virtual GaInzSb substrate with a given lattice constant. The experiment shows that the deviation of the modulation period from ∼2.3 to ∼5.5 nm leads to the shift of the maximum of 20 K photoluminescence from 12.9 to 19.6 μm. It is concluded that the growth of strain compensated InAsSbx/InAsSby on virtual substrates allows developing narrow bandgap III-V materials with various bandgap energies.

Original languageEnglish
Pages (from-to)1521-1522
Number of pages2
JournalElectronics Letters
Volume51
Issue number19
DOIs
StatePublished - Sep 17 2015

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