Bitte benutzen Sie diesen Identifier, um auf die Ressource zu verweisen: https://oa.tib.eu/renate/handle/123456789/4866
Dateien zu dieser Publikation:
Datei Beschreibung GrößeFormat 
1903.09375.pdf5,55 MBAdobe PDFAnzeigen/Öffnen
Titel: Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures
Autor(en): Lim, Carolin B.Ajay, AkhilLähnemann, JonasBougerol, CatherineMonroy, Eva
Verlagsversion: https://doi.org/10.1088/1361-6641/aa919c
URI: https://doi.org/10.34657/137
https://oa.tib.eu/renate/handle/123456789/4866
Erscheinungsjahr: 2017
Publiziert in: Semiconductor Science and Technology
Verlag: Bristol : IOP
Abstract: This paper assesses the effects of Ge-doping on the structural and optical (band-to-band and intersubband (ISB)) properties of GaN/AlGaN multi-quantum wells (QWs) designed to display ISB absorption in the short-wave, mid- and far-infrared ranges (SWIR, MIR, and FIR, respectively). The standard c-plane crystallographic orientation is considered for wells absorbing in the SWIR and MIR spectral regions, whereas the FIR structures are grown along the nonpolar m-axis. In all cases, we compare the characteristics of Ge-doped and Si-doped samples with the same design and various doping levels. The use of Ge appears to improve the mosaicity of the highly lattice-mismatched GaN/AlN heterostructures. However, when reducing the lattice mismatch, the mosaicity is rather determined by the substrate and does not show any dependence on the dopant nature or concentration. From the optical point of view, by increasing the dopant density, we observe a blueshift of the photoluminescence in polar samples due to the screening of the internal electric field by free carriers. In the ISB absorption, on the other hand, there is a systematic improvement of the linewidth when using Ge as a dopant for high doping levels, whatever the spectral region under consideration (i.e. different QW size, barrier composition and crystallographic orientation).
Schlagwörter: GaN; AlGaN; quantum well,; nonpolar; intersubband; doping; germanium
Publikationstyp: article; Text
Publikationsstatus: acceptedVersion
DDC: 530
Lizenz: CC BY-NC-ND 3.0 Unported
Link zur Lizenz: https://creativecommons.org/licenses/by-nc-nd/3.0/
Enthalten in den Sammlungen:Physik

Zur Langanzeige
Lim, Carolin B., Akhil Ajay, Jonas Lähnemann, Catherine Bougerol and Eva Monroy, 2017. Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures. 2017. Bristol : IOP
Lim, C. B., Ajay, A., Lähnemann, J., Bougerol, C. and Monroy, E. (2017) “Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures.” Bristol : IOP. doi: https://doi.org/10.1088/1361-6641/aa919c.
Lim C B, Ajay A, Lähnemann J, Bougerol C, Monroy E. Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures. Vol. 32. Bristol : IOP; 2017.
Lim, C. B., Ajay, A., Lähnemann, J., Bougerol, C., & Monroy, E. (2017). Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures (Version acceptedVersion, Vol. 32). Version acceptedVersion, Vol. 32. Bristol : IOP. https://doi.org/https://doi.org/10.1088/1361-6641/aa919c
Lim C B, Ajay A, Lähnemann J, Bougerol C, Monroy E. Effect of Ge-doping on the short-wave, mid- and far-infrared intersubband transitions in GaN/AlGaN heterostructures. 2017;32. doi:https://doi.org/10.1088/1361-6641/aa919c


Diese Publikation wurde unter der folgenden Lizenz veröffentlicht: Creative-Commons-Lizenz Creative Commons