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Deterministic integrated tuning of multicavity resonances and phase for slow-light in coupled photonic crystal cavities

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8 Author(s)
Gu, T. ; Optical Nanostructures Laboratory, Columbia University, New York, New York 10027, USA ; Kocaman, S. ; Yang, X. ; McMillan, J.F.
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We present the integrated chip-scale tuning of multiple photonic crystal cavities. The optimized implementation allows effective and precise tuning of multiple cavity resonances (up to ∼1.60 nm/mW) and intercavity phase (∼0.038 π/mW) by direct local temperature tuning on suspended silicon nanomembranes. Through designing the serpentine metal electrodes and careful electron-beam alignment to avoid cavity mode overlap, the coupled photonic crystal L3 cavities preserve their high quality factors. The deterministic resonance and phase control enables switching between the all-optical analog of electromagnetically-induced-transparency to flat-top filter lineshapes, with future applications of trapping photons and optoelectronic modulators.

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Applied Physics Letters  (Volume:98 ,  Issue: 12 )