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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Temperature dependence of voltage-controlled polarization plane rotation in a magnetic and electro-optic heterostructure
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Temperature dependence of voltage-controlled polarization plane rotation in a magnetic and electro-optic heterostructure

机译：电压控制偏振平面旋转在磁性和电光异质结构中的温度依赖性

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摘要

We propose a theoretical study of the influence of temperature on the state of polarization of a near-infrared light beam reflected from or transmitted through a voltage-controlled nematic liquid crystal (LC) cell deposited on a magnetic film. In both cases, the change in polarization with respect to that of the incoming beam originates in the linear Kerr or Faraday effects taking place in the magnetic layer, but the overall value of the polarization plane rotation depends on the reflectivity and transmittivity of the whole heterostructure. Temperature manifests itself in all layers of the structure through both thermal expansion and the thermo-optic effect when it varies between room temperature and the temperature of nematic-isotropic phase transition in the LC. The thermo-optic effect is strongest in the LC cell, where it is shown to induce noticeable variations of the polarization plane rotation of both reflected and transmitted light beams in that temperature range. Such temperature-dependent changes of the magneto-optical response can be compensated for by adjusting the dc voltage applied to the LC. On the other hand, we show that they may be exploited for sensitive temperature monitoring.
机译：我们提出了对通过沉积在磁性膜上的电压控制的向列液晶（LC）电池的近红外光束的温度对近红外光束极化状态的理论研究。在这两种情况下，相对于进入光束的偏振的变化来源于在磁性层中发生的线性克尔或法拉第效应，但偏振平面旋转的总值取决于整个异质结构的反射率和透射率。当在室温和LC中的向列 - 各向同性相变温度之间变化时，温度通过热膨胀和热视光效应在结构的所有层中显示出来。在LC电池中，热敏效应最强，在该温度范围内显示出诱导反射和透射光束的偏振平面旋转的显着变化。通过调节施加到LC的DC电压可以补偿磁光响应的这种温度依赖性变化。另一方面，我们表明它们可能会被利用以进行敏感温度监测。

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