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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >An approach to achieving a negative index of refraction using coincident resonances
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An approach to achieving a negative index of refraction using coincident resonances

机译：一种使用重合共振实现负折射率的方法

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摘要

A novel method of achieving a negative index of refraction in the far-infrared region using intrinsic material properties is proposed. SrTiO3 has a dielectric resonance at similar to 100 cm(-1) that can be lowered by lowering the temperature or with Ba doping. NiO has an antiferromagnetic resonance at similar to 35 cm(-1) that can be raised with an applied field or with Co doping. These resonance frequencies can therefore be engineered to occur at the same frequency to achieve a negative index of refraction over an interval just above the coincident resonance. We show that SrTiO3 and NiO are readily chemically compatible and non-reacting at temperatures up to 1550 degrees C and can be formed into polycrystalline composite bodies. Epitaxial thin film heterostructures of ( SrTiO3/NiO) n/ MgO with n = 1, 2 have also been fabricated with very high crystal quality.
机译：提出了一种利用固有材料特性在远红外区域实现负折射率的新方法。 SrTiO3的介电共振类似于100 cm（-1），可以通过降低温度或掺杂Ba来降低。 NiO具有类似于35 cm（-1）的反铁磁共振，可以通过施加电场或Co掺杂来提高。因此，可以将这些共振频率设计为以相同的频率出现，以在恰好高于重合共振的间隔内实现负折射率。我们表明，SrTiO3和NiO在高达1550摄氏度的温度下易于化学相容并且不发生反应，并且可以形成多晶复合体。 （srTiO3 / NiO）n / MgO的n = 1、2的外延薄膜异质结构也已经以很高的晶体质量制成。

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