Abstract
Hyperbolic metasurfaces (HMSs), composed of subwavelength and regularly-arranged metallic blocks, show great potential for manipulating surface plasmon polaritons (SPPs) and designing advanced surface wave devices. Additionally, topological transition that describes the special dispersion properties in HMSs has attracted immense interest. Here, we propose a novel terahertz HMS that enables bidirectional hyperbolic surface modes in orthogonal directions by placing terahertz electric dipoles at different edges of the model. Moreover, while previous literature mostly focused on the study of eigenmodes, our research on multi-energy bands will expand the application range of planar photonic devices in self-collimating transport, negative refraction and anomalous wave propagation.
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