Efficient coupling of light between single-mode waveguides and supercollimating photonic crystals

K. Vynck; E. Centeno; M. Le Vassor d'Yerville; D. Cassagne

doi:10.1117/12.781135

6 May 2008 Efficient coupling of light between single-mode waveguides and supercollimating photonic crystals

K. Vynck, E. Centeno, M. Le Vassor d'Yerville, D. Cassagne

Proceedings Volume 6989, Photonic Crystal Materials and Devices VIII; 69891I (2008) https://doi.org/10.1117/12.781135
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

We study the coupling of light between strip and rib waveguides and supercollimating photonic crystals on silicon-on-insulator substrates. The dispersive properties of the supercollimating photonic crystal are used to define the design requirements on the excitation waveguide and the boundary of the photonic crystal is optimized to improve the impedance matching between the two structures. By 3D calculations, we find that rib waveguides can yield transmission effciencies up to about 96 % and reflections lower than 0.2 % at wavelengths close to 1.55 μm, while insuring single-mode propagation. This work therefore constitutes an important step toward the integration of supercollimation-based optical circuits on photonic chips.

Citation Download Citation

K. Vynck, E. Centeno, M. Le Vassor d'Yerville, and D. Cassagne "Efficient coupling of light between single-mode waveguides and supercollimating photonic crystals", Proc. SPIE 6989, Photonic Crystal Materials and Devices VIII, 69891I (6 May 2008); https://doi.org/10.1117/12.781135

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