GaAs1-xBix /GaNyAs1-y type-II quantum wells: novel strain-balanced heterostructures for GaAs-based near- & mid-infrared photonics

Christopher A. Broderick*, Shirong Jin, Igor P. Marko, Konstanze Hild, Peter Ludewig, Zoe L. Bushell, Wolfgang Stolz, Judy M. Rorison, Eoin P. O'reilly, Kerstin Volz, Stephen J. Sweeney

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Abstract

The potential to extend the emission wavelength of photonic devices further into the near-And mid-infrared via pseudomorphic growth on conventional GaAs substrates is appealing for a number of communications and sensing applications. We present a new class of GaAs-based quantum well (QW) heterostructure that exploits the unusual impact of Bi and N on the GaAs band structure to produce type-II QWs having long emission wavelengths with little or no net strain relative to GaAs, while also providing control over important laser loss processes. We theoretically and experimentally demonstrate the potential of GaAs 1 'x Bi x /GaN y As 1 'y type-II QWs on GaAs and show that this approach offers optical emission and absorption at wavelengths up to ∼3 μm utilising strain-balanced structures, a first for GaAs-based QWs. Experimental measurements on a prototype GaAs 0.967 Bi 0.033 /GaN 0.062 As 0.938 structure, grown via metal-organic vapour phase epitaxy, indicate good structural quality and exhibit both photoluminescence and absorption at room temperature. The measured photoluminescence peak wavelength of 1.72 μm is in good agreement with theoretical calculations and is one of the longest emission wavelengths achieved on GaAs to date using a pseudomorphically grown heterostructure. These results demonstrate the significant potential of this new class of III-V heterostructure for long-wavelength applications.

Original languageEnglish
Article number46371
JournalScientific Reports
Volume7
Early online date19 Apr 2017
DOIs
Publication statusPublished - 19 Apr 2017

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