We present and demonstrate a new type of single resonator based planar metamaterial exhibiting electromagnetically induced transparency (EIT)-like transmission behavior. The novel design involves physically coupled split-ring resonator (SRR) and a dipolar ring as opposed to many inductively coupled resonators explored in the past. Both experiments and simulations reveal a dispersive transparency due to coupled resonances and the underlying mechanism. Further, the conductive and inductive coupling scenarios for this structure were compared where conductive coupling was found to coerce the direction of light induced currents and stronger in effect than inductive coupling. Resonance tuning is achieved by moving the bar coupling SRR and the ring. Hence, we show that conductive coupling has potential in tailoring coupled resonances of desired quality factor and fabricating metamaterials for enhanced sensing.
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 d<sub>p</sub> between pairs, they are named 2SP. Geometric parameters a, b, t, h, d, d<sub>p</sub>,
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 d<sub>p</sub>, 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 d<sub>p</sub> justifying the design of a cylindrical hyperlens depending on bent
X-ray phase-contrast tomographic microimaging is a powerful tool to reveal the internal structure of opaque soft-matter objects that are not easily seen in standard absorption contrast. In such low Z materials, the phase shift of X-rays transmitted can be important as compared to the absorption. An easy experimental set up that exploits refractive contrast formation can deliver images that are providing detailed structural information. Applications are abundant in fields
including polymer science and engineering, biology, biomedical engineering, life sciences, zoology, water treatment and filtration, membrane science, and micro/nanomanufacturing. However, available software for absorptive contrast tomography cannot be simply used for structure retrieval as the contrast forming effect is different. In response, CSIRO has developed a reconstruction code for phase-contrast imaging. Here, we present a quantitative comparison of a micro phantom manufactured at SSLS with the object reconstructed by the code using X-ray images taken at SSLS. The phantom is a 500 μm thick 800 μm diameter cylindrical disk of SU-8 resist having various eccentric cylindrical bores with diameters ranging from 350 μm to 40 μm. Comparison of these parameters that are well known from design and post-manufacturing measurements with reconstructed ones gives encouraging results.