Abstract

The energy consumption of light sources must be reduced to realize on-chip optical interconnects. This study proposes a buried-ridge-waveguide (BRW) structure to enhance the lateral optical confinement. An increase in the lateral optical confinement induces the reduction in the threshold current, and it also provides a differential resistance due to a reduction in the distance between the electrode and active region. The stripe width and ridge height are designed considering the internal loss and differential resistance. A comparison between the BRW and conventional flat structures demonstrates a 20% and 35% reduction in the threshold current and differential resistance, respectively.

© 2021 Optical Society of America

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