A MoS₂-based broadband and multiband metamaterial absorber in the visible band

Abstract

A broadband MoS2-based absorber composed of Ag rod/MoS2/dielectric/Ag is proposed in the visible band. The relative bandwidth is 65% for the absorption above 80%. The absorber also has the properties of polarization-independence and wide-angle absorption. Impedance matching theory is used to analyze the physical mechanism of the broadband absorption. By investigating the absorption property of each part of the absorber, it is found that the absorption is enhanced by introducing the two-dimensional material MoS2. The broadband absorber can be changed to be multiband absorber by changing the thickness of dielectric substrate. This structure provides a new perspective to enhance absorption in the visible band and has promising applications in solar cells.

Broadband and perfect absorption in monolayer MoS2-based multilayered structure arranged in Kolakoski sequence

“…Therefore, broadband high absorption becomes the next research goal to be achieved. For example, S. Tong Song et al proposed a multilayer MoS 2 -based absorber structure composed of Ag rod/MoS 2 /dielectric/Ag, which can achieve more than 80% broadband light absorption in the visible light band [20]. X. Luo et al used a multilayer absorber composed of metamaterials, gold materials, and monolayer molybdenum disul de to achieve a good absorption effect, in which the absorption of monolayer MoS 2 was enhanced by an average of 67% in the range of 710 to 801 nm [21].…”

Using Periodic Trapezoidal Ag Strips and Silicon Dioxide Slab for Polarization-Independent Narrowband Absorber

“…Gratings are widely used in many fields due to their special periodic structure. [1][2][3] With its unique characteristics of beam splitting, polarization, dispersion, absorption, and phase matching, gratings occupy an important position in optical communications, [4,5] wavelength division multiplexing, [6][7][8][9] photoelectric sensors, [10][11][12][13][14] liquid crystal displays, [15][16][17] and optical signal acquisition and processing. [18][19][20] The absorber can achieve single-band and multi-band absorption with different structural designs.…”