Abstract
An artificial crystal structure has been fabricated exhibiting a full three-dimensional photonic bandgap effect at mid-infrared to optical communication wavelengths. The photonic crystal was constructed by stacking micrometer to sub-micrometer period semiconductor stripes with the accuracy of 30 nm by advanced wafer-fusion technique. The bandgap effect of larger than 40 dB (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 sharp bend.
