标题： 热电磁场在平衡和非平衡条件下的相关长度 显示英文标题

标题： On correlation lengths of thermal electromagnetic fields in equilibrium and out of equilibrium conditions

摘要： 热半空间在真空中产生的远场和近场区域中热场的空间相干性在本质上不同的热力学条件下进行研究。 结果显示，在平衡和非平衡系统中，任何场区的场相关长度都是不同的。 在样品表面的广泛距离范围内，由于某些条件下的反相关性，必须使用倏逝波和传播贡献的总和来计算相关函数，因为它们会相互补偿。 结果表明，使用所提出公式计算的相关长度与表面激发光谱范围内的热场相关函数的行为一致。 显示英文摘要

摘要： Spatial coherence of thermal fields in far- and near-field zones generated by heated half-space into vacuum is studied at essentially different thermodynamical conditions. It is shown that correlation lengths of fields in any field zone are different in equilibrium and out of equilibrium systems. In wide range of distances from sample surface correlation functions are should be calculated using a total sum of evanescent and propagating contributions due to their mutual compensation at some conditions because of anticorrelations. It is demonstrated that correlation lengths as calculated with a proposed formula are in agreement with a behavior of correlation functions of thermal fields in spectral range of surface excitations