In this paper, we design and present a graphene-based “ancient coin”-type dual-band perfect metamaterial absorber, which is composed of silver layer, silicon dioxide top coin” graphene layer. The absorption performance the absorber affected by hollowed-out square in center layer geometric parameters remaining nano disk. optical properties can be changed adjusting voltage, to control dynamically...

Metamaterial absorbers can provide good solutions for radar-cross-section (RCS) reduction. In spite of their attractive features of thinness, lightness, and low cost, resonant metamaterial absorbers have a drawback of narrow bandwidth. For practical radar applications, wideband absorbers are necessary. In this paper, we propose a wideband-switchable metamaterial absorber using liquid metal. In ...

We report on a mid-infrared fiber laser that uses single-walled carbon nanotube saturable absorber mirror to realize the mode-locking operation. The generates 3.5 µm ultra-short pulses from an erbium-doped fluoride by utilizing dual-wavelength pumping scheme. Stable is achieved at band with repetition rate of 25.2 MHz. maximum average power acquired in regime 25 mW. experimental results indicat...

There are numerous applications for microwave absorbers in the L, S, C, X, and Ku bands. Creating a terahertz absorber, on other hand, has proven difficult. This paper presents metamaterial absorber operates at frequencies. It square shaped outer ring circle inner unit cell split resonator. The substrate is dielectric material ground metallic. According to simulation results, resonates two freq...

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A fully polarimetric compact radar range operating at a center frequency of 100 GHz has been developed for obtaining radar cross section, inverse synthetic aperture radar imagery and high range resolution profiles on targets and structures of interest. The 100 GHz radar range provides scale-model RCS measurements for a variety of convenient scale factors including W-Band (1:1 scale), C-band (1:...