Outcoupling of light generated in a monolithic silicon photonic crystal nanocavity through a lateral waveguide

Dominic F. Dorfner, Satoshi Iwamoto, Masahiro Nomura, Shigeru Nakayama, Jonathan J. Finley, Gerhard Abstreiter, Yasuhiko Arakawa

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Abstract

We report the design, fabrication and optical investigation of silicon nanocavity light sources based on silicon on insulator photonic crystal nanocavities. The planar geometry of the two-dimensional photonic crystal allows light to be efficiently out-coupled into a planar photonic circuit and our results demonstrate enhanced light transmission from a defect nano-cavity into a W1 photonic crystal waveguide. When compared to the sample without the cavity, we observe an 11-fold enhancement of the luminescence emitted from the cleaved facets of the waveguide measured at the cavity wavelength. The emission exhibits a characteristically strong spatial dependence, confirming that it indeed arises from light generated in the cavity and out-coupled via the waveguide. The obtained cavity mode frequency and spatial dependence are in excellent agreement with finite-difference time-domain simulations and their dependence on the photonic crystal structural properties.

Original languageEnglish
Article number062003
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume48
Issue number6
DOIs
StatePublished - Jun 2009

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