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We demonstrate the angle dependence of spoof surface plasmon on metallic hole arrays in terahertz regime. By varying polar angle and azimuthal angle, we have observed frequency shifting and splitting of resonance modes. The amplitude of extraordinary optical transmission also shows angle dependence and exhibits mirror-image or translational symmetries.
The plasmonic metamaterial perfect absorber (MPA) is a recently developed branch of metamaterial which exhibits nearly unity absorption within certain frequency range [1–6]. The optically thin MPA possesses characteristic features of angular-independence, high Q-factor and strong field localization that have inspired a wide range of applications including electromagnetic wave absorption [3, 7, 8],...
The plasmonic metamaterial perfect absorber (MPA) is a recently developed branch of metamaterial which exhibits nearly unity absorption within certain frequency range [1–6]. The optically thin MPA possesses characteristic features of angular-independence, high Q-factor and strong field localization that have inspired a wide range of applications including electromagnetic wave absorption [3, 7, 8],...
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