Abstract

Partial bandgap characteristics of parallelogram lattice photonic crystals are proposed to suppress the radiation modes in a compact dielectric waveguide taper so as to obtain high transmittance in a large wavelength range. Band structure of the photonic crystals shows that there exists a partial bandgap. The photonic crystals with partial bandgap are then used as the cladding of a waveguide taper to reduce the radiation loss efficiently. In comparison with the conventional dielectric taper and the complete bandgap photonic crystal taper, the partial bandgap photonic crystal taper has a high transmittance of above 85% with a wide band of 170 nm.

© 2009 Chinese Optics Letters

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Gao, X.

Hu, E. L.

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Huang, Y.

Khoo, E. H.

Liang, Z.

Lipsion, M.

Liu, A. Q.

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Panepucci, R. R.

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Peng, J.

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J. Opt. Soc. Am. A

Opt. Express

Opt. Lett.

Other

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