Integrated optics, optical losses, optical waveguides, photonic crystals (PhCs), waveguide bends
We propose the hybrid integration of an air hole photonic crystal (PhC) structure with a high (0.75%) single-mode silica waveguide to achieve an ultracompact high efficiency 90 bend for transverse-magnetic polarized light. Diffraction from the periodic boundary between the PhC and silica waveguide regions is shown to seriously degrade the optical efficiency of the bend. A microgenetic algorithm ( GA) combined with a two-dimensional finite-difference time-domain method is used to modify the PhC and its boundary layer to suppress this diffraction which in turn maximizes bend efficiency. The final optimized structure has a 99.4% bend efficiency at a wavelength of 1.55 m and occupies an area of only 27 27 m.
Original Publication Citation
S. Kim, G. P. Nordin, J. Jiang, and J. Cai, "High efficiency 9 degree silica waveguide bend using an air hole photonic crystal region," IEEE Photonics Tech. Let. 16(8), pp. 1846-1848 (24)
BYU ScholarsArchive Citation
Cai, J.; Kim, S.; Nordin, Gregory P.; and Jiang, J., "High efficiency 90 degree silica waveguide bend using an air hole photonic crystal region" (2004). All Faculty Publications. 1025.
Institute of Electrical and Electronics Engineers (IEEE)
Ira A. Fulton College of Engineering and Technology
Electrical and Computer Engineering
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