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Photonic Crystal Tapers for Coupling Large Ridge Waveguides to Photonic Crystal Waveguides

Published online by Cambridge University Press:  01 February 2011

Francis C. Ndi  and
Jean Toulouse
Francis C. Ndi
Affiliation:
Physics Department, Lehigh University, 16 memorial drive east, Bethlehem PA 18015, USA
Jean Toulouse
Affiliation:
Physics Department, Lehigh University, 16 memorial drive east, Bethlehem PA 18015, USA
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Abstract

We present a study of various photonic crystal taper structures each characterized by the taper angle and roughness for coupling light into 2-dimensional photonic crystal waveguides from large ridge waveguides. The photonic crystal waveguide is made of a triangular lattice of holes in a dielectric. The objective is to find a taper structure that offers the best coupling efficiency over a range of widths of the ridge waveguide while leaving a small footprint. We show that such a structure indeed exists and can be further optimized as the width of the ridge waveguide gets even larger leading to more than 90% increase in coupling efficiency in some cases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 797: Symposium W – Engineered Porosity for Microphotonics and Plasmonics , 2003 , W5.8
Copyright
Copyright © Materials Research Society 2004

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References

REFERENCES

[1] Joannopoulos, J.D., Meade, R. D. and Winn, J. N., Photonic Crystals (Princeton U. Press, Princeton N.J., 1995)Google Scholar
[2] Prather, D. W., Murakowski, J., Shi, S., Vankataraman, S, Sharkawy, A., Chen, C. and Pustai, D., “High-efficiency coupling structure for a single-line-defect photonic crystal waveguide”, Opt. Lett., 27, 1601 (2002)Google Scholar
[3] Sanchis, P., Marti, J., Garcia, A., Martinez, A. and Blasco, J., “High efficiency coupling technique for planar crystal waveguides”, Electronics Letters, 38, No. 17 (2002)Google Scholar
[4] Happ, T. D., Kamp, M. and Forchel, A., “Photonic crystal tapers for ultracompact mode conversion”, Opt. Lett. 26, 1102 (2001)Google Scholar
[5] Xu, Y., Lee, R. K. and Yariv, A., “Adiabatic coupling between conventional dielectric waveguides and waveguides with discrete translational symmetry”, Opt. Lett. 25, 755 (2000)Google Scholar
[6] Mekis, A., Joannopoulos, J. D., “Tapered couplers for efficient interfacing between dielectric and photonic crystal waveguides”, J. Lightwave Technol. 19, 861 (2001)Google Scholar
[7] Sadiku, M. N. O., “Numerical techniques in electromagnetics” (CRS, Boca Raton, Florida, 2001), pp 121–219 Google Scholar
[8] This result was obtained using a commercial 2-dimemsional bandstructure calculation program based on the plane wave expansion method.Google Scholar