Design of a waveguide-coupled GeSn disk laser
| Autor: | Bahareh Marzban, Jovana Nojic, Dan Buca, Daniela Stange, Jeremy Witzens |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Waveguide lasers
Interconnection Materials science business.industry FOS: Physical sciences chemistry.chemical_element Physics::Optics Germanium Applied Physics (physics.app-ph) Substrate (electronics) Physics - Applied Physics Waveguide (optics) chemistry Optoelectronics Disk laser business Optics (physics.optics) Physics - Optics |
| Popis: | 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 $\mu$m radius, with 42% of the power being recycled in the laser cavity. |
| Databáze: | OpenAIRE |
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