Abstract:A Ge/GeSn/Ge double heterojunction p‐i‐n vertical cavity surface emitting laser (VCSEL) is designed in this paper. According to the principle of distributed Bragg reflection (DBR), 6 and 12 pairs of SiO2/Si layers as the DBR are prepared on the upper and lower sides of the p‐i‐n structure. The upper and lower DBRs, as the resonant cavity of the laser, replace the Fabry Perot (FP) cavity of the conventional laser. The effects of Sn component and the ultra‐injection technique on the performance of the device are… Show more
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