An Ultra-Broadband Terahertz Absorber Based on Coplanar Graphene and Gold Hybridized Metasurface

Enhancing broadband terahertz absorption via a graphene-based metasurface absorber featuring a rectangular ring and triple crossbars

“…Terahertz technology between microwave and infrared radiation frequencies has recently generated substantial interest within the engineering community [1][2][3]. This attention comes from using dynamic materials such as semiconductors, graphene, and liquid crystals [4][5][6][7][8][9][10][11].…”

Hole-Embedded Graphene Metamaterial for THz Absorption: A New Approach for Efficient Device Design

“…Recently, broadband absorption in the THz regime has been realized using various graphene metamaterials, such as multi-layered stacked bars [17], graphene metasurface [18], net-shaped periodically sinusoidally-patterned single-layer [19], two interlaced shnet layers [20], multiring [21], hybrid patterned metasurfaces [22], monolayer [23], etc. Among those, the shnet-shaped graphene structure is one of the most acceptable and e cient approaches [24][25][26][27]. Conventionally, it is done by cutting graphene into a speci c shnet pattern following precise device dimensions, where it is crucial to stick to the accuracy of the cuts.…”

Photoresponse enhancement in a cavity–antenna-coupled graphene terahertz detector

“…[10][11][12][13] However, limited by the atomic-scale thickness and the small active area of a graphene flake, graphene-based THz detectors always suffer from insufficient THz wave coupling. [14][15][16] There have been numerous theoretical or simulation studies on the absorption enhancement in graphene by metamaterials, [17][18][19][20] metasurfaces, [21][22][23] photonic crystals, [24][25][26] waveguides, 27 and resonant cavities. [28][29][30] However, the fabrication of these complex structures still hinders the practical applications of graphene-based THz detectors.…”