Submonolayer Uniformity of Type II InAs/GaInSb W-shaped Quantum Wells Probed by Full-Wafer Photoluminescence Mapping in the Mid-infrared Spectral Range
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- The spatial uniformity of GaSb- and InAs substrate-based structures containing type II quantum wells was probed by means of large-scale photoluminescence (PL) mapping realized utilizing a Fourier transform infrared spectrometer. The active region was designed and grown in a form of a W-shaped structure with InAs and GaInSb layers for confinement of electrons and holes, respectively. The PL spectra were recorded over the entire 2-in. wafers, and the parameters extracted from each spectrum, such as PL peak energy position, its linewidth andThe spatial uniformity of GaSb- and InAs substrate-based structures containing type II quantum wells was probed by means of large-scale photoluminescence (PL) mapping realized utilizing a Fourier transform infrared spectrometer. The active region was designed and grown in a form of a W-shaped structure with InAs and GaInSb layers for confinement of electrons and holes, respectively. The PL spectra were recorded over the entire 2-in. wafers, and the parameters extracted from each spectrum, such as PL peak energy position, its linewidth and integrated intensity, were collected in a form of two-dimensional spatial maps. Throughout the analysis of these maps, the wafers' homogeneity and precision of the growth procedure were investigated. A very small variation of PL peak energy over the wafer indicates InAs quantum well width fluctuation of only a fraction of a monolayer and hence extraordinary thickness accuracy, a conclusion further supported by high uniformity of both the emission intensity and PL linewidth.…
Autor(en): | Mateusz Dyksik, Marcin Motyka, Grzegorz Sęk, Jan Misiewicz, Matthias Dallner, Robert Weih, Martin Kamp, Sven Höfling |
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URN: | urn:nbn:de:bvb:20-opus-139733 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Nanoscale Research Letters |
Erscheinungsjahr: | 2015 |
Band / Jahrgang: | 10 |
Heft / Ausgabe: | 402 |
Originalveröffentlichung / Quelle: | Nanoscale Research Letters (2015) 10:402. DOI 10.1186/s11671-015-1104-z |
DOI: | https://doi.org/10.1186/s11671-015-1104-z |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 535 Licht, Infrarot- und Ultraviolettphänomene |
Freie Schlagwort(e): | fourier transform spectroscopy; interband cascade lasers; mid-infrared; spatially resolved photoluminescence; type II quantum wells |
Datum der Freischaltung: | 03.11.2016 |
EU-Projektnummer / Contract (GA) number: | 318798 |
OpenAIRE: | OpenAIRE |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |