Electronically Controlled Surface Plasmon Dispersion and Optical Transmission through Metallic Hole Arrays Using Liquid Crystal

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• 作者：Wayne Dickson ; Gregory A. Wurtz ; Paul R. Evans ; Robert J. Pollard ; Anatoly V. Zayats
• 刊名：Nano Letters
• 出版年：2008
• 出版时间：January 2008
• 年：2008
• 卷：8
• 期：1
• 页码：281 - 286
• 全文大小：490K
• 年卷期：v.8,no.1(January 2008)
• ISSN：1530-6992

文摘

The enhanced optical properties of metal films periodically perforated with an array of sub-wavelength size holes have recently been widelystudied in the field of surface plasmon optics. The ability to design the optical transmission of such nanostructures, which act as plasmoniccrystals, by varying their geometrical parameters gives them great flexibility for numerous applications in photonics, opto-electronics, andsensing. Transforming these passive optical elements into devices that may be actively controlled has presented a new challenge. Here, wereport on the realization of an electrically controlled nanostructured optical system based on the unique properties of surface plasmon polaritoniccrystals in contact with a liquid crystal (LC) layer. We discuss the effect of LC layer modulation on the surface plasmon dispersion, the relatedoptical transmission and the underlying mechanism. The reported effect may be used to achieve active spectral tuneability and switching ina wide range of applications.