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- W2077457941 abstract "We report improved minority carrier lifetimes in n-type-doped and tensile-strained germanium by measuring direct bandgap photoluminescence from germanium-on-insulator substrates with various levels of defect density. We first describe a method to fabricate a high-quality germanium-on-insulator substrate by employing direct wafer bonding and chemical-mechanical polishing. Raman spectroscopy measurement was performed to assess the purity of the transferred layer on an insulator. Using time-resolved photoluminescence decay measurement, we observe that minority carrier lifetimes can be improved by over a factor of 3 as the defective top interface of our material stack is removed. Our high-quality germanium-on-insulator should be an ideal platform for high-performance, germanium-based photonic devices for on-chip optical interconnects." @default.
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- W2077457941 date "2014-10-22" @default.
- W2077457941 modified "2023-10-02" @default.
- W2077457941 title "Observation of improved minority carrier lifetimes in high-quality Ge-on-insulator using time-resolved photoluminescence" @default.
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- W2077457941 doi "https://doi.org/10.1364/ol.39.006205" @default.
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