We demonstrate a thermally controlled ultra-wideband wide incident angle metamaterial absorber with switchable transmission at the THz band in this paper. The underlying hybrid structure of FSS-VO2 thin films make them between absorption mode and by controlling temperature. It can achieve above 90% from 1 to 10 exhibits excellent performance under range polarization angles high temperature (80 °C). At room (27 °C), it acts coefficient up 60% 3.1278 THz. region is inside band, which very...

A graphene-based tunable wideband metamaterial absorber with polarization insensitivity and wide-incident-angle is presented in this paper. The results show that the absorption over 90% from 5GHz to 8GHz when fermi level of graphene 0.5eV, can be tuned by electrically changing Fermi graphene. mechanism explained calculating normalized input impedance monitoring surface current. Finally, adequately verify has advantages wide-incident-angle. Thus, it holds great potential application value on...

Abstract Graphene has the capability of dynamically tuning its conductivity through gate voltage. Based on this fact, an electrically switchable wideband metamaterial absorber at low frequencies is presented and investigated in paper. Our calculated results show that absorption over 90% from 400 to 1,000 MHz with Fermi level graphene being 0 eV band can be switched by adjusting without changing physical structure. Moreover, surface current distribution enables us reveal characteristics our...

We report a new kind of ultra-thin tunable metamaterial absorber at P band based on the high permittivity and its thermally property strontium titanate. It is composed copper ring titanate top layer, FR4 film middle bottom sections. The absorption reaches 96% 684 MHz 300 K acquires frequency by altering external temperature. Moreover, we study surface current electric field distribution to explore physical mechanism electromagnetic wave absorption. Finally, prove that insensitive...

In this paper, we report a switchable ultra-wideband metamaterial absorber with polarization-insensitivity and wide-incident angle at THz band which is composed of VO 2 disk, polyimide dielectric substrate, gold ground plane. The results show that the absorption greater than 90% from 3.5–8 for temperature 300 K disappears when rises to 350 K. property our proposed insensitive polarization states angles it can withhold high more 80% angles, up 60° TE mode TM mode. wideband mechanism...

A kind of wideband metamaterial absorber at E band is designed in this paper; it composed round metal cells with defect, dielectric substrate and film. The electromagnetic parameters unit cell are calculated by using the finite element method. results show that presents nearly perfect absorption above 90% ranging from 65.38GHz to 67.86GHz; reason overlap different frequency which caused resonance; size position defect has important effect on its property. It many advantages, such as simply,...

Based on the tunable conductivity of silicon as a function incident pump power, photoexcited switchable dual-function metamaterial absorber for sensing and wideband absorption at THz band is designed in this paper. The has an peak 2.08 with up to 99.6% when 150 Sm-1, which can be used sensing. refractive index sensitivity 456 GHz/RIU. A generated from 3.4 4.5 bandwidth 1.1 σsi = 12,000 Sm-1. generation mechanism explained by monitoring surface current, electric, magnetic field distribution...

The VO 2 thin film has the advantage of thermally controlled insulator-metal phase transition. Based on this, we presented a reconfigurable metamaterial with switchable wideband absorption and sensing at THz band in this paper. At low temperature ([Formula: see text][Formula: text]S/m), can realize nearly perfect range 6.88–9[Formula: text]THz. When rises to certain extent an peak which be used appears 4.08[Formula: text]THz permittivity sensitivity 0.5[Formula: text]THz/PU. advantages...

A mechanically controlled switchable wideband frequency–selective rasorber/absorber, with the transmission window inside absorption band, based on a surface and rotatable metal plate, is presented in this paper. The of rasorber/absorber over 90%, from 3.9 GHz to 11.77 GHz, when plate parallel rest layers, its coefficient can reach up 0.62 at 11.6 perpendicular layers. mechanism are explained by monitoring analyzing current distribution frequencies. control method simple, reliable accurate....

Metamaterial absorber (MMA) has great potential application in many scientific and technical fields due to its perfect absorption characteristics. For most practical applications, the bandwidth is one of important performance metrics. In this paper, we demonstrate a design wideband tunable MMA based on graphene. The proposed shows at different externally applied voltage. simulated exceeds 90% from 7.6 THz 8.5THz full width half maximum 75% (from 7.505THz 8.705THz), which achieved by using...

As a general business language, accounting plays an important role in international economic exchanges and development. This paper uses CiteSpace software developed by Professor Chen Chaomei to analyse the hot topics frontiers of research recent ten years. The results show that, earnings management, information disclosure executive compensation are area research. After emergence word literature analysis, it is found frontier has not changed significantly past years, some classic academic...

The aqueous metamaterials absorber has the advantages of better toughness and so on, it great prospect at practical application. tunable was designed based on temperature, dissolved solids concentration, quality shape in this paper for its Its absorption property mechanism studied using Microwave studio CST. results showed that frequency gradually shifted to higher with increasing temperature; rate increased concentration; water sea had peaks, but peak disappeared case distilled water;...

Based on the provincial panel data from 2005 to 2017, paper investigates input level of higher education budget funds in various regions our country, and uses index mean, standard deviation describe regional differences average student general public expenditure east, middle west regions. The research shows that, although imbalance China is reduced, there still between regions, some within region. Furthermore, also examines impact per capita GDP, financial income, ratio expenditure,...

Abstract Based on PIN diode and resistive film, a dual/single wideband switchable metamaterial absorber at low frequency is presented in this paper. Its absorption over 90% from 0.8GHz to 1.5GHz 4.2GHz 5.2GHz while the operates forward biased condition. On contrary, with acting reverse condition, above occurs 1.1GHz 3.2GHz. The surface current distributions frequencies are monitored explain reason of absorption. simulation results show that property polarization-sensitive. possesses...