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首页> 外文期刊>Applied optics >Induced-dipole-electric-field contribution of atomic chains and atomic planes to the refractive index and birefringence of nanoscale crystalline dielectrics
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Induced-dipole-electric-field contribution of atomic chains and atomic planes to the refractive index and birefringence of nanoscale crystalline dielectrics

机译：原子链和原子平面的感应偶极电场对纳米级晶体电介质的折射率和双折射的贡献

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摘要

The induced-dipole-electric-field contribution to the refractive index at any location within a nanometer-scaledielectric is quantified by summing the electronic dipole contributions due to all the surrounding atoms in the dielectric. Using a tetragonal lattice and varying the ratio of lattice constants illustrates the important limiting chainlike and planelike behaviors. Strong polarizing effects and thus high refractive indices occur for an electric field applied along the length of a chain of atoms or applied in a planar direction to a plane of atoms. In contrast, a strong depolarizing effect and thus low refractive indices occur for an electric field applied normal to a chain of atoms or applied normal to a plane of atoms. Birefringence is increased or decreased by the simultaneous presence or absence of polarizing and depolarizing effects.
机译：通过对由于电介质中所有周围原子引起的电子偶极贡献的求和，可以量化出感应偶极电场对纳米级介电体内任何位置的折射率的贡献。使用四边形晶格并改变晶格常数的比率说明了重要的限制链状和平面状行为。对于沿着原子链的长度施加的电场或在平面方向上施加到原子平面的电场，会发生强偏振效应，从而产生高折射率。相反，对于垂直于原子链施加的电场或垂直于原子平面施加的电场，发生强的去极化作用，从而产生低折射率。通过同时存在或不存在偏振和去偏振效应，双折射增加或减小。

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