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首页> 外文会议>2010 27th International Conference on Microelectronics Proceedings >Absorption features of symmetric molecular nanofilms
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Absorption features of symmetric molecular nanofilms

机译：对称分子纳米膜的吸收特征

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摘要

A microscopic theory of dielectric properties of symmetrical ultrathin molecular films, was formulated in bosonic and nearest-neighbor approximation. The dispersion law of harmonic exciton states were calculated using the method of two-time, temperature dependent Green's functions. It has been shown that two types of excitations can be occurred: bulk and surface exciton states. Exciton spectral weights and space distribution along the direction of broken symmetry were analyzed as well. Calculating of dynamical permittivity by the single-pole Green's functions have shown that the threshold of light absorption can be moved along frequencies, changing the film thickness and the intensity of boundary perturbations. This can give a great contribution to practical ultrathin film engineering.
机译：对称的超薄分子薄膜的介电性质的微观理论，以玻色和近邻近似的形式提出。谐波激子态的色散定律是使用两次与温度相关的格林函数的方法来计算的。已经证明可以发生两种类型的激发：体和表面激子态。还分析了沿对称对称方向的激子谱权重和空间分布。通过单极格林函数计算动态介电常数表明，光吸收阈值可以沿频率移动，从而改变膜的厚度和边界扰动的强度。这可以为实用的超薄膜工程做出巨大贡献。

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