Nonlinear response of silicon photonic crystal micresonators excited via an integrated waveguide and fiber taper
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Open Access
- 1 January 2005
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 13 (3) , 801-820
- https://doi.org/10.1364/opex.13.000801
Abstract
A technique is demonstrated which efficiently transfers light between a tapered standard single-mode optical fiber and a high-Q, ultra-small mode volume, silicon photonic crystal resonant cavity. Cavity mode quality factors of 4.7×104 are measured, and a total fiber-to-cavity coupling efficiency of 44% is demonstrated. Using this efficient cavity input and output channel, the steady-state nonlinear absorption and dispersion of the photonic crystal cavity is studied. Optical bistability is observed for fiber input powers as low as 250 µW, corresponding to a dropped power of 100 µW and 3 fJ of stored cavity energy. A high-density effective free-carrier lifetime for these silicon photonic crystal resonators of ~0.5 ns is also estimated from power dependent loss and dispersion measurements.Keywords
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