The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A class of electro-optically tunable metamaterial absorbers is designed and theoretically investigated in the infrared regime towards realizing free-space amplitude modulators. The spacer between a subwavelength metallic stripe grating and a back metal reflector is occupied by a bilayer of indium tin oxide (ITO) and hafnium oxide ($$\hbox {HfO}_2$$ HfO2 ). The application of a bias voltage across...
In this work, we propose a novel design of a double microring-on-disk electro-optic modulator based on hybrid plasmonic conductor-gap-silicon platform utilizing the electromagnetic induced transparency response. The modulator can be realized using relatively simple fabrication processes and has a very low power consumption of about 2.12 fJ/bit.
A THz wire grid polarizer on cyclo-olefin Zeonor polymer film that exhibits high extinction ratio and low losses is theoretically and experimentally investigated. The polarizer has an extinction ratio between 30 and 45 dB and insertion losses below 1 dB in the 0.3–2.5 THz range. The high-performance characteristics of the polarizer are preserved even when it is bent at a radius of 12.5 mm. Although...
Novel liquid-crystal tunable metamaterial devices for terahertz wave manipulation are designed and investigated. Deeply subwavelength layers of nematic materials are introduced in metal-liquid-crystal-metal cavities, leading to strong interaction of the THz wave with the liquid crystal anisotropy. The enhanced response in the liquid-crystal layer yields extensive tunability of the electromagnetic...
The optical properties of gold stripe waveguides enhanced with a liquid-crystal overlayer are theoretically investigated. Extensive tunability of modal effective index, area and losses can be achieved via the electro-optic control of the nematic molecules.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.