论文标题
Terahertz成像中光学调制的优点用于研究石墨烯层
Advantages of optical modulation in terahertz imaging for study of graphene layers
论文作者
论文摘要
已经证明，光学调制以及同时的Terahertz（THZ）成像应用可以通过数量级来增加对比度的增加，从而将技术作为方便的无接触式工具，用于表征在高阻力硅硅底物上沉积石墨烯。结果表明，可以在连续波模式下使用离散频率的THZ图像对比度来区分单层和双层石墨烯。已经达到了45％的调制深度，在单个和双层石墨烯的激光照明下，从0.16到0.23的对比变化分别暴露在0.23中。该技术应用于针对THZ成像系统的基于石墨烯的光学衍射元件的开发和研究。
It was demonstrated that optical modulation together with simultaneous terahertz (THz) imaging application enables an increase in contrast by an order of magnitude illustrating hence the technique as convenient contactless tool for characterization of graphene deposited on high-resistivity silicon substrates. It was shown that the single- and double-layer graphene can be discriminated and characterized via variation of THz image contrast using a discrete frequency in a continuous wave mode. Modulation depth of 45 % has been reached, the contrast variation from 0.16 up to 0.23 is exposed under laser illumination for the single and double layer graphene, respectively. The technique was applied in the development and investigation of graphene-based optical diffractive elements for THz imaging systems.
