Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip

arxiv: 1108.0680 · v1 · pith:XDWJSQ4Hnew · submitted 2011-08-02 · ⚛️ physics.optics

Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip

C. Baker , C. Belacel , A. Andronico , P. Senellart , A. Lemaitre , E. Galopin , S. Ducci , G. Leo

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I. Favero

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classification ⚛️ physics.optics

keywords diskgaassuspendedchipcouplingcriticalopticalwaveguide

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We report on an integrated GaAs disk/waveguide system. A millimeter-long waveguide is suspended and tapered on the chip over a length of 25 {\mu}m to evanescently couple to high Q optical whispering gallery modes of a GaAs disk. The critical coupling regime is obtained both by varying the disk/guide gap distance and the width of the suspended nanoscale taper. The experimental results are in good agreement with predictions from the coupled mode theory.

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Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip

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