1 September 2009 Self-supported all-metal THz metamaterials
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Ideal metamaterials would consist of metal conductors only that are necessary for negative ε and μ. However, most of present-day metamaterials include dielectrics for various support functions. Overcoming dielectrics, we manufactured free-standing THz metamaterials as bi-layer chips of S-string arrays suspended by window-frames at a small gap that controls the resonance frequency. Remaining problems concerning their useful range of incidence angles and the possibility of stacking have been solved by manufacturing the first self-supported free-standing all-metal metamaterials featuring upright S-strings interconnected by metal rods. Large-area slabs show maximum magnetic coupling at normal incidence with left-handed resonances between 3.2 - 4.0 THz. Such metamaterials which we dub the meta-foil represent an ideal platform for including index-gradient optics to achieve optical functionalities like beam deflection and imaging.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. O. Moser, L. K. Jian, H. S. Chen, M. Bahou, S. M. P. Kalaiselvi, S. Virasawmy, S. M. Maniam, X. X. Cheng, S. P. Heussler, Shahrain bin Mahmood, B.-I. Wu, "Self-supported all-metal THz metamaterials", Proc. SPIE 7392, Metamaterials: Fundamentals and Applications II, 73920E (1 September 2009); doi: 10.1117/12.826679; https://doi.org/10.1117/12.826679


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