Importance

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Abstract

Columnar pillars are arranged in a square lattice pattern to form a two-dimensional photonic crystal. The two-dimensional photonic crystal has crystal defects created by the absence of pillars, and a resonator is formed in a line waveguide provided by the crystal defects. The resonator is made up of a main pillar, a pair of sub-pillars disposed at the light incidence side of the waveguide with respect to the main pillar and another pair of sub-pillars at the light emitting side of the waveguide with respect to the main pillar, the main pillar and sub-pillars being disposed in the waveguide. The main pillar and the sub-pillars are formed of the same medium as that of the pillars, and are formed simultaneously with the pillars by patterning a silicon thin film coated all over a silicon substrate through a SiO.sub.2 film formed over the entire surface thereof. Light of a particular wavelength in wavelength-multiplexed incident light is transmitted through the resonator.

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First Claim