K. Simonyan, Hermine Gharagulyan, Henrik Parsamyan, Ashot Khachatryan, M. Yeranosyan
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引用次数: 0
Abstract
The operation of the metasurface based on silicon cylindrical rings coated by a gold as a terahertz (THz) bandpass filter/antireflection structure is studied. The decrease in the reflectance is conditioned by the destructive interference of electromagnetic waves reflected from structural layers of the metasurface. An efficient antireflection band with the reflectance below 10% is formed in the frequency spectrum of 0.71 to 0.92 THz with a relative bandwidth of 26%. It is shown that the operating spectrum of the suggested metasurface can be varied by changing the total radius of cylindrical rings, whereas the filter's performance is rather insensitive to the variations in cylinder height and inner radius. The dependence of the antireflection band on the polarization and incidence angle of the THz waves is also analyzed. The antireflection band is sensitive to changes in the surrounding medium, hence supporting the use of the structure as a refractive index sensor.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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