High-quality AlGaN/GaN superlattices for near- and mid-infrared intersubband transitions

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Abstract

A pulsed layer-by-layer deposition (PLLD) technique possessing triple growth rates compared to conventional growth techniques is developed by metal-organic chemical vapor deposition to realize high-quality high-aluminum content ordered Al XGa (1-X)N (0.5<X). X-ray diffraction, photoluminescence, and transmission measurements are employed to demonstrate control over aluminum content, structural uniformity, and optical quality in the ordered Al XGa (1-X)N. To show the feasibility of device applications, Al XGa (1-X)N as barrier and GaN as well are employed in superlattices demonstrating intersubband transitions in the infrared regime. Effects of well width and barrier aluminum content on the intersubband absorption characteristics are reported.

Original languageEnglish (US)
Article number013514
JournalJournal of Applied Physics
Volume111
Issue number1
DOIs
StatePublished - Jan 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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