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- W2058038059 abstract "This paper presents a novel valance intersubband laser based on Si-based Si-Ge superlattices grown on a relaxed Si0.5Ge0.5 buffer layer. Effective mass theory is used to calculate the inplane valence subband dispersion of Si-Ge superlattices within 6×6 Kane model. Analysis of the inplane energy dispersion shows that the light-hole effective mass is inverted at off zone center region. The laser structure can be designed with a simple quantum cascade scheme. Our calculation shows that with the electrical pump, it is possible to achieve population inversion between the two subbands at local k space where the light-hole effective mass is inverted. Optical gain of the order 100/cm can be achieved with a pumping current density 10 kA/cm2." @default.
- W2058038059 created "2016-06-24" @default.
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- W2058038059 date "2007-03-01" @default.
- W2058038059 modified "2023-09-23" @default.
- W2058038059 title "Design and Simulation of a Mid-Infrared Quantum Cascade Laser Based on Ge-Si Superlattices" @default.
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- W2058038059 doi "https://doi.org/10.4028/www.scientific.net/ssp.121-123.677" @default.
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