Journal Article

FZJ-2026-01441

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Luminescence properties of GeSn laser materials: Influence of buffered substrates

Aagaard, M. (Corresponding author) ; Concepción, O.FZJ* ; Buca, D.FZJ* ; Ikonic, Z. ; Julsgaard, B.

2025
American Inst. of Physics Melville, NY

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Please use a persistent id in citations: doi:10.1063/5.0281958  doi:10.34734/FZJ-2026-01441

Abstract: Time-resolved photoluminescence spectroscopy is used to measure the luminescence lifetime of two direct bandgap GeSn samples. The GeSn samples are similar in respect to the material properties, except for one being grown on a thin Ge-post-deposition annealed buffered layer, while the other is grown on a thick Ge virtual substrate. The total photoluminescence intensity and the lifetime of the samples are compared as a function of temperature between 20K and 300K and pump fluence between 2.5 × 1013 cm−2 and 1 × 1015 cm−2, showing little difference between the two samples. The luminescence lifetime varies only little with temperature, and calculations of the total photoluminescence intensity based on k·p-theory are compared to experimentally attained values, yielding a good functional agreement versus temperature. The results point to the L-valley as one of the primary inhibiting factors of the photoluminescence intensity at non-cryogenictemperatures.

Keyword(s): Information and Communication (1st) ; Materials Science (2nd)

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)

Research Program(s):

1. 5234 - Emerging NC Architectures (POF4-523) (POF4-523)
2. DFG project G:(GEPRIS)299480227 - SiGeSn Laser für die Silizium Photonik (299480227) (299480227)
3. LASTSTEP - group-IV LASer and deTectors on Si-TEchnology Platform (101070208) (101070208)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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