Proceedings Article | 29 April 2010
H. Moser, L. Jian, H. S. Chen, S. M. Kalaiselvi, S. Virasawmy, X. X. Cheng, A. Banas, K. Banas, S. Heussler, M. Bahou, B.-I. Wu, Wei Hua, Zhu Yi
KEYWORDS: Electromagnetism, Metamaterials, Terahertz radiation, Magnetism, Gold, Solid state lighting, Infrared spectroscopy, Infrared radiation, Microscopy, Hyperlenses
Meta-foils are all-metal free-standing electromagnetic metamaterials based on interconnected S-string architecture. They
provide a versatile applications' platform. Lacking any substrate or embedding matrix, they feature arrays of parallel
upright S-strings with each string longitudinally shifted by half an S compared to its neighbour to form capacitance-inductance
loops. Geometric parameters include length a, width b, thickness t, and height h of an S, the gap between
adjacent S-strings d, and the periodicity p of the interconnecting lines. Equidistant strings at p=1 form a 1SE meta-foil.
Grouped in pairs of gap d, exhibiting a gap dp between pairs, they are named 2SP. Geometric parameters a, b, t, h, d, dp,
pS(E or P) and materials' properties like electric conductivity, Young's modulus, thermal expansion coefficient, and heat
capacity determine the electromagnetic, mechanical, and thermal properties of meta-foils including the spectral
dependence of resonance frequencies, refractive index, transmission, reflection, and bending. We show how the
frequency and transmission of left-handed pass-bands depend on a, p, and dp, the pSP geometry exhibiting higher
resonance frequency and transmission. Equivalent circuit considerations serve to explain physical reasons. We also
demonstrate mechanical behavior versus p and dp justifying the design of a cylindrical hyperlens depending on bent
meta-foils.
