Full Three-Dimensional Photonic Bandgap Crystals at Near-Infrared Wavelengths

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Science  28 Jul 2000:
Vol. 289, Issue 5479, pp. 604-606
DOI: 10.1126/science.289.5479.604

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An artificial crystal structure has been fabricated exhibiting a full three-dimensional photonic bandgap effect at optical communication wavelengths. The photonic crystal was constructed by stacking 0.7-micrometer period semiconductor stripes with the accuracy of 30 nanometers by advanced wafer-fusion technique. A bandgap effect of more than 40 decibels (which corresponds to 99.99% reflection) was successfully achieved. The result encourages us to create an ultra-small optical integrated circuit including a three-dimensional photonic crystal waveguide with a sharp bend.

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