| 摘要 |
A structure includes a photonic crystal layer including a first member having a high refractive index in which a plurality of holes are periodically arranged, and a second member having a low refractive index. A third member is disposed on the first member. The third member has a refractive index higher than 1.0 and lower than the refractive index of the first member. The holes of the photonic crystal layer have a depth in the range of 20% to 80% of the thickness of the first member.
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