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Published February 7, 2005 | Published
Journal Article Open

Nonlinear response of silicon photonic crystal microresonators excited via an integrated waveguide and fiber taper

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.

Additional Information

© 2005 Optical Society of America Original Manuscript: December 1, 2004; Revised Manusctipt: November 30, 2004; Published: February 7, 2005 The authors thank Matthew Borselli for helpful discussion. This work was supported by the Charles Lee Powell foundation. KS would also like to thank the Hertz foundation for its support through a graduate fellowship.

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August 22, 2023
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