All-dielectric water-based metamaterial absorber in terahertz domain

Miniaturized Frequency Selective Surface for 6G Communication

“…outer radius R. It can also be interpreted that based on Equation (1), the equivalent indu ance L grows larger due to the increase of the electrical length caused by the rise of R. a result, the resonant frequency shifts to lower frequency according to Equation (3) Due to the obvious symmetry of the structure, the proposed FSS is insensitive to p larization, which is not studied in detail here. Since the incident waves could be from v ious directions, the angle-insensitive devices are more expectable.…”

“…Nevertheless, considering the realization of power source and system integration, the most promising candidate for 6G communication is the frequency range of 73–140 GHz. Consequently, various kinds of devices for the next generation communication, such as absorbers [ 3 ], antennas [ 4 , 5 , 6 ], filters [ 7 , 8 ], lens [ 9 ], are in urgent demand and these devices must meet the requirements of low-cost, miniaturization and simple-structure for compact and high integration systems.…”

Review of Broadband Metamaterial Absorbers: From Principles, Design Strategies, and Tunable Properties to Functional Applications

“…[71,[280][281] In describing self-assembly technology for designing and manufacturing BMAs, we summarize previous works and divide them into two main aspects: the direct sputtering design approach, [285][286][287][288][289][290][291][292][293] and template assisted design method. [294][295][296][297][298][299][300][301][302][303][304][305] Finally, we also briefly summarize the current emerging construction methods for low-cost broadband absorption, such as the all-dielectric design method, [318][319][320][321][322][323][324][325][326][327][328][329][330] and unpatterned method. [331][332][333][334][335][336][337] A comprehensive summary of the design strategies of BMAs is necessary for readers to intuitively understand how to construct BMAs and provide helpful guidance for the sustainable prosperity and in-depth research of BMAs.…”

“…Therefore, the most cost-effective approach is to omit the metal used to make resonance and the ground plane at the bottom and use only low-cost dielectrics to make the broadband absorption. [318][319][320][321][322][323][324][325][326][327][328][329][330] Meanwhile, the use of low-cost dielectric materials could reduce the harm to the environment, thus laying a solid foundation for the preparation of environment-friendly BMAs. Among the common dielectrics, water could be considered to be one of the most accessible materials in nature, and the all-dielectric BMAs with the help of water are undoubtedly a cost-effective way.…”

“…[320] In the THz frequency band, Feng et al introduced and investigated an all-dielectric MA consisting of an array of water encapsulated in a polytetrafluoroethylene container. [321] It achieves more than 90% absorption in the broadband band from 0.3 to 1.5 THz.…”