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Dramatic enhancement of near-infrared intersubband absorption in c-plane AlInN/GaN superlattices

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4944847· OSTI ID:1420603

We report substantial improvement of near-infrared (2–2.6 μm) intersubband absorption in c-plane AlInN/GaN superlattices grown by molecular beam epitaxy. Progress was obtained through optimization of AlInN growth conditions using an AlInN growth rate of 0.9-nm/min at substrate temperature of 550 °C, as well as by judiciously placing the charge into two delta-doping sheets. Structural characterization suggests that AlInN crystal quality is enhanced and interface roughness is reduced. Importantly, near-infrared absorption data indicate that the optical quality of the AlInN/GaN superlattices is now comparable with that of AlN/GaN superlattices designed to exploit near-infrared intersubband transitions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012704
OSTI ID:
1420603
Alternate ID(s):
OSTI ID: 22591460
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 12 Vol. 108; ISSN 0003-6951
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

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