论文标题
波导耦合GESN磁盘激光器的设计
Design of a waveguide-coupled GeSn disk laser
论文作者
论文摘要
我们报告了波导耦合的GESN微型风光腔的设计，其中重新使用了用作GESN生长模板的锗虚拟底物，以定义被动片上片上互连波导的定义。一个主要挑战在于将光功率从上部（SI）GESN增益堆栈传输到基础虚拟底物层，并通过激光模式工程求解。设计基于实验实现的层堆叠和波导超出耦合效率高达27％的效率，在紧凑谐振器几何形状中显示出较小的7 $ $ M $ m radius，其中42％的功率在激光腔中循环起来。
We report on the design of a waveguide coupled GeSn microdisk-laser cavity in which the germanium virtual substrate serving as a template for GeSn growth is repurposed for the definition of passive on-chip interconnection waveguides. A main challenge resides in transferring the optical power from the upper (Si)GeSn gain stack to the underlying virtual substrate layer and is solved with laser mode engineering. Designs are based on experimentally realized layer stacks and waveguide outcoupling efficiencies as high as 27% are shown in compact resonator geometries with a small, 7 $μ$m radius, with 42% of the power being recycled in the laser cavity.
