Design of a waveguide-coupled GeSn disk laser
Applied Physics
2020-08-14 v1 Optics
Abstract
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 m radius, with 42% of the power being recycled in the laser cavity.
Cite
@article{arxiv.2006.06381,
title = {Design of a waveguide-coupled GeSn disk laser},
author = {Bahareh Marzban and Jovana Nojic and Daniela Stange and Dan Buca and Jeremy Witzens},
journal= {arXiv preprint arXiv:2006.06381},
year = {2020}
}