Over the last few years, significant progresses have been made on photonic crystal based surface-emitting lasers on silicon. Both membrane-reflector VCSELs (MR-VCSELs) and bandedge effect based PCSELs have been reported with silicon based photonic crystal cavities and hybrid integrated compound semiconductor gain materials. In this talk, we will report recent advances in these laser structures. Lasing characteristics will be reported considering different coupling efficiencies for both low and room temperature operations. The lateral cavity size effect will also be discussed in making low threshold lasers with small cavity sizes. Finally the integration of other coupling structures will be discussed for beam routing in-plane.
Work is supported by ARO, AFOSR, and NSF.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon