近晶膜弯月面的波动不稳定性
Undulation instabilities in the meniscus of smectic membranes
摘要：
利用光学显微镜、相移干涉仪和原子力显微镜，我们证明了铁电近晶-C * 薄膜弯月面中存在起伏结构。弯月面的特征在于近晶-空气界面的周期性波动，其表现为条纹图案。不稳定性消失在未倾斜的近晶-A相。调制幅度和调制波长都依赖于弯月面厚度。我们研究了结构的温度演化，并提出了一个简单的模型，占所观察到的起伏。
英文摘要：
Using optical microscopy, phase shifting interferometry and atomic force microscopy, we demonstrate the existence of undulated structures in the meniscus of ferroelectric smectic-C* films. The meniscus is characterized by a periodic undulation of the smectic-air interface, which manifests itself in a striped pattern. The instability disappears in the untilted smectic-A phase. The modulation amplitude and wavelength both depend on meniscus thickness. We study the temperature evolution of the structure and propose a simple model that accounts for the observed undulations.
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