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- W2300177342 abstract "Optical gain characteristics of Ge1xSnμx are simulated systematically.With an injection carrier concentration of 5×1018/cm3 at room temperature,the maximal optical gain of Ge0.922Sn0.078 alloy(with n-type doping concentration being 5×1018/cm3) reaches 500 cm-1.Moreover,considering the free-carrier absorption effect,we find that there is an optimal injection carrier density to achieve a maximal net optical gain.A double heterostructure Ge0.554Si0.289Sn0.157/Ge0.922Sn0.078/Ge0.554Si0.289Sn0.157 short-wave infrared laser diode is designed to achieve a high injection efficiency and low threshold current density.The simulation values of the device threshold current density Jthare 6.47 kA/cm2（temperature:200 K,and λ=2050 nm）,10.75 kA/cm2（temperature:200 K,and λ=2000 nm）,and23.12 kA/cm2（temperature:300 K,and λ=2100 nm）,respectively.The results indicate the possibility to obtain a Si-based short-wave infrared Ge1-xSnx laser." @default.
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- W2300177342 date "2015-01-01" @default.
- W2300177342 modified "2023-09-28" @default.
- W2300177342 title "Theoretical study of the optical gain characteristics of a Ge1-xSnx alloy for a short-wave infrared laser" @default.
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