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We present experimental and theoretical studies of coupled resonances in multiple silicon photonic crystal cavities in an all-optical classical analogy to electromagnetically induced transparency. Multiple implementation schemes are demonstrated, such as two (in various configurations), and four cavities. The photonic crystal cavities are embedded in 2-D photonic crystal slabs and designed in the overcoupled regime. Our observations include measured transparency resonance lifetimes more than three times the single-cavity lifetimes, Fano-like lineshapes, and stepwise resonance control through multiple aligned external optical pump beams. All observed schemes are analyzed rigorously through finite-difference time-domain simulations and the coupled-mode formalism. Our experimental and theoretical results are applicable to optical pulse trapping and all-optical dynamical storage of light in the solid state.
Selected Topics in Quantum Electronics, IEEE Journal of (Volume:16 , Issue: 1 )
Date of Publication: Jan.-feb. 2010