文件名称:1c
- 所属分类：
- 图形图像处理(光照,映射..)
- 资源属性：
- [PDF]
- 上传时间：
- 2012-11-26
- 文件大小：
- 276kb
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- 0次
- 提 供 者：
- Q***
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We rigorously analyze the dispersion function and the curvature of the dispersion surface of a photonic
crystal to explore the fundamental limit of its angular sensitivities. With insight gained from group theory, we
fi nd that symmetry induced degeneracy gives rise to a singular dispersion surface curvature and a nonvanishing
group velocity simultaneously. Near such a singularity, high angular sensitivities can be achieved at low optical
loss. This phenomenon exists generally in most common two-dimensional and three-dimensional photonic
crystal lattices, although it occurs only for certain photonic bands as dictated by symmetry. -We rigorously analyze the dispersion function and the curvature of the dispersion surface of a photoniccrystal to explore the fundamental limit of its angular sensitivities. With insight gained from group theory, we
crystal to explore the fundamental limit of its angular sensitivities. With insight gained from group theory, we
fi nd that symmetry induced degeneracy gives rise to a singular dispersion surface curvature and a nonvanishing
group velocity simultaneously. Near such a singularity, high angular sensitivities can be achieved at low optical
loss. This phenomenon exists generally in most common two-dimensional and three-dimensional photonic
crystal lattices, although it occurs only for certain photonic bands as dictated by symmetry. -We rigorously analyze the dispersion function and the curvature of the dispersion surface of a photoniccrystal to explore the fundamental limit of its angular sensitivities. With insight gained from group theory, we
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