Lasing in localized modes of a slow light photonic crystal waveguide

Details Lasing in localized modes of a slow light photonic crystal waveguide Lasing in localized modes of a slow light photonic crystal waveguide

2011-05-03

arxiv.org/abs/1105.0465v1

Physics

Optics

8 pages, 4 figures

Scientific paper

10.1063/1.3600344

We demonstrate lasing in GaAs photonic crystal waveguides with InAs quantum dots as gain medium. Structural disorder is present due to fabrication imperfection and causes multiple scat- tering of light and localization of light. Lasing modes with varying spatial extend are observed at random locations along the guide. Lasing frequencies are determined by the local structure and occur within a narrow frequency band which coincides with the slow light regime of the waveguide mode. The three-dimensional numerical simulation reveals that the main loss channel for lasing modes located away from the waveguide end is out-of-plane scattering by structural disorder.

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