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http://dx.doi.org/10.3807/COPP.2022.6.6.590

Incident-angle-based Selective Tunability of Resonance Frequency in Terahertz Planar Metamolecules  

Lim, A Young (Department of Physics and Optoelectronics Convergence Research Center, Chonnam National University)
Lee, Joong Wook (Department of Physics and Optoelectronics Convergence Research Center, Chonnam National University)
Publication Information
Current Optics and Photonics / v.6, no.6, 2022 , pp. 590-597 More about this Journal
Abstract
We carry out numerical simulations of the responses of planar metamaterials composed of metamolecules under obliquely incident terahertz waves. A Fano-like-resonant planar metamaterial, with two types of resonance modes originating from the two meta-atoms constituting the meta-molecules, exhibits high performance in terms of resonance strength, as well as the outstanding ability to manipulate the resonance frequency by varying the incident angle of the terahertz waves. In the structure, the fundamental electric dipole resonance associated with Y-shaped meta-atoms is highly tunable, whereas the inductive-capacitive resonance of C-shaped meta-atoms is relatively omnidirectional. This is attributed to the electric near-field coupling between the two types of meta-atoms. Our work provides novel opportunities for realizing terahertz devices with versatile functions, and for improving the versatility of terahertz sensing and imaging systems.
Keywords
Metamaterials; Optical devices; Terahertz;
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