Simplified perfect absorber structure

Multi-band metamaterial absorber based on the arrangement of donut-type resonators

“…Therefore, the achievement is still a significant issue in the MM-A researches. In spite of numerous studies, many issues remain to be explored, for example, to relax the working conditions and to increase the number of absorption peaks and the absorption bandwidth [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], as well as to switch the absorption properties [14,25] from microwave to infrared frequencies, because of significant impact in the field of solar cells [26], photodetectors [27], sensors [28], imaging devices [29] and thermal emitters [30].…”

Low-frequency metamaterial absorber with small-size unit cell based on corrugated surface

“…6 Metamaterial absorber (MMA) has attracted considerable attention since Landy proposed an ultra-thin perfect absorber composed of artificial sub-wavelength composites. 7 To date, a large number of efforts [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] have been made on MMAs to achieve multi-band absorption, broadband absorption, polarization-insensitive absorption and wide incident angle absorption, due to the important applications in the field of solar cells, 24 thermal emitters 25 and sensors. 26 In general, the traditional MMAs are constructed of a delicate periodic patterned metal layer for minimizing reflection by impedance matching and a background metal layer for blocking transmission, separated by a flat dielectric substrate for dissipating energy.…”

Optimization of an Optical Thermal Absorber Plasmonic Metamaterial: Understanding the Two Particle Interactions

“…In a similar study to the one conducted by Landy, Tuong et al [14] Toung discovered a strong correlation between reflection, due to the "g" in the "C" corners and absorbance since transmittance was almost totally extinct in the dielectric medium. she was able to demonstrate a much simpler structure as compared to Landy's which was still able to achieve a sharp, resonant peak in the GHz region just by changing the geometry of ERR without changing the separation distance or the center.…”

“…Employing a similar three layer design of metal-dielectric-metal sandwich model as mentioned above [14,27], she was able to demonstrate an even sharper and more symmetrical peak as compared to earlier works [13,14,47]. Such a sharp, well defined, perfect absorber would be a huge contribution in applications like bolometers.…”

“…as illustrated in the polarization sensitive which had been improved upon by researchers Wakatsuchi et al [47] and Tuong et al [14]…”