The filtering properties of doped one-dimensional photonic crystal containing negative refractive index material are studied by using transfer matrix method.

利用转移矩阵法，研究了含负折射率材料的一维光子晶体掺杂后的滤波性质。

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Finite integration technique (FIT) is used to simulate the effects of shape change and optical printing precision on resonant frequency and the pass band of negative refractive index material.

下面利用有限积分法模拟形状变化和光刻精度产生的缺陷对负折射谐振频率和通带的影响。

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Dr Feld also has plans to use beams of different colours, since each colour has a slightly different refractive index in a given material.

ECONOMIST: Microscopy

The essential idea is that where someone has posted material that breaches said privacy laws then Google should be forced into removing that material from the index.

FORBES: Google Should Censor Its Results Says British Parliament

The broader index, which includes auto and building material, was softer but still gained from June levels and reached 0.6% on the month, after posting 0.3% month on month gains in June.

FORBES: Brazil Retail Sales Ignore Slowdown; Inflation Battle Continues