Order to disorder optical phase transition in random photonic crystals
Order to disorder optical phase transition in random photonic crystals
复制标题
随机光子晶体中光学相变的有序化
DOI：
10.1007/s00340-011-4595-z
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Obara
中科院分区：
文献类型：
--
作者：
S. Takeda;S. Hamada;R. Peretti;P. Viktorovitch;M. Obara
用计算方法研究了随机光子晶体中引入随机性引起的光学模态性质的跃迁过程。我们分析了二维三角形光子晶体的脉冲响应，其中气孔的位置略微偏离随机方向。结果表明，适当程度的随机偏离完美晶体状态会引起低群速度带边模式的多次散射，并支持它们的强安德森局域化。所获得的光的约束效率超过了在完美光子晶体状态下获得的约束效率。
Transition process of optical modal properties induced by the introduction of randomness into random photonic crystals is investigated by a computational method. We analyze an impulse response of two-dimensional triangular photonic crystals, in which the positions of the air holes are slightly deviated to random directions. It is shown that the appropriate degree of random departure from a perfect crystal state gives rise to multiple scattering of low group velocity band-edge modes and supports their strong Anderson localization. The achieved confinement efficiency of light exceeds the one obtained in the perfect photonic crystal state.