Hostname: page-component-745bb68f8f-b6zl4 Total loading time: 0 Render date: 2025-02-05T15:09:08.549Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

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