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- W2031277237 abstract "We report the first observation of room-temperature quantum-confined photoluminescence (PL) from low-dimensional Ge1−xSnx/Ge superlattices (SLs) up to a high Sn content of 6.96%. Both direct and indirect emissions associated with the interband transitions between minibands in the conduction bands and valence band were observed at room temperature. As the Sn content is increased, the energy difference between the lowest direct and indirect transitions is reduced, indicating an effective modification of the band structure desired for optoelectronics. The integrated PL intensity ratio of direct to indirect recombinations is significantly enhanced with increasing Sn content due to the reduced Γ-L energy separation and quantum confinement effect. Those results suggest that Sn-based low-dimensional structures are promising material for efficient Si-based lasers." @default.
- W2031277237 created "2016-06-24" @default.
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- W2031277237 date "2013-09-04" @default.
- W2031277237 modified "2023-09-27" @default.
- W2031277237 title "Quantum-confined photoluminescence from Ge_1−xSn_x/Ge superlattices on Ge-buffered Si(001) substrates" @default.
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- W2031277237 doi "https://doi.org/10.1364/ol.38.003485" @default.
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