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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CK1_2

Low-power continuous-wave frequency conversion in far-field optimized silicon photonic crystal nanocavities

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Abstract

High-Q photonic crystal (PhC) nanocavities [1] have become very popular in recent years, as they offer a unique way to enhance radiation-matter interaction at a nanometer scale. In particular, these systems allow to achieve strong enhancement of the optical nonlinearities such as harmonics generation [2,3], thus yielding the exciting possibility to extend the coherent emission of telecom lasers to shorter wavelengths in the visible and near ultraviolet spectral windows. Even though such high-Q PhC cavities are very well suited for in-plane applications on photonic chips, a major issue might be represented by their off-plane radiation pattern, which makes vertical in- and out-coupling difficult. In this work, we investigate the possibility to modify the far-field radiation pattern of different high-Q PhC nanocavities, to achieve a simultaneously high quality factor and coupling efficiency to an external laser beam in a vertical-coupling configuration. As a very promising application of this concept, we then exploit the far-field optimized silicon PhC nanocavities [4] to obtain a simultaneous low-power continuous-wave harmonic generation in the visible spectrum.

© 2011 Optical Society of America

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