Transmission resonance in a composite plasmonic structure

The design, fabrication, and optical properties of a composite plasmonic structure, a two-dimentional array of split-ring resonators inserted into periodic square holes of a metal film, have been reported. A new type of transmission resonance, which makes a significant difference from the conventional peaks, has been suggested both theoretically and experimentally. To understand this effect, a mechanism of ring- resonance induced dipole emission is proposed.Comment: 14 pages, 4 figure

Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular Beam Epitaxy Grown Monolayer Vanadium Ditelluride.

We present a combined experimental and theoretical study of monolayer vanadium ditelluride, VTe2, grown on highly oriented pyrolytic graphite by molecular-beam epitaxy. Using various in situ microscopic and spectroscopic techniques, including scanning tunneling microscopy/spectroscopy, synchrotron X-ray and angle-resolved photoemission, and X-ray absorption, together with theoretical analysis by density functional theory calculations, we demonstrate direct evidence of the metallic 1T phase and 3d1 electronic configuration in monolayer VTe2 that also features a (4 × 4) charge density wave order at low temperatures. In contrast to previous theoretical predictions, our element-specific characterization by X-ray magnetic circular dichroism rules out a ferromagnetic order intrinsic to the monolayer. Our findings provide essential knowledge necessary for understanding this interesting yet less explored metallic monolayer in the emerging family of van der Waals magnets

Correction to Metallic 1T Phase, 3d1 Electronic Configuration and Charge Density Wave Order in Molecular-Beam Epitaxy Grown Monolayer Vanadium Ditelluride.

It has been brought to our attention that a mistake exists in the author list. The author “Johnson Goh” in the original article should be “Kuan Eng Johnson Goh”. His primary corresponding email is [email protected]

IL-18 polymorphisms and tuberculosis susceptibility: a meta-analysis

Objective: To investigate the association between IL-18 polymorphisms and Tuberculosis(TB). Materials and methods: We searched PubMed and Embase databases, and conducted a meta-analysis using 4 models. Data were extracted from the studies by two independent reviewers. Statistical analysis was performed using STATA 12.0 software. Results: Five qualified studies with a total of 1293 TB patients and 1724 controls were included.There was no significant association between the IL-18 -607C>A polymorphism and TB risk in the total population(AA vs CC: OR=1.27,95% CI=0.82-1.96;-CA vs CC:OR=1.06,95% CI=0.89-1.26; Dominant model: OR =1.09, 95% CI =0.83-1.43; Recessive model:OR=1.23, 95% CI=0.92-1.65).For IL-18 -137G>C polymorphism, lack of an association was also found(GG vs CC: OR=1.42,95% CI=0.78-2.58;GC vs CC:OR=1.16,95% CI=0.62-2.16; Dominant model: OR =1.34,95% CI=0.74-2.43;Recessive model:OR=0.96,95%- CI=0.26-3.56). Conclusion: The present meta-analysis found no evidence for IL-18 -607C>A and -137G>C polymorphisms as risk factors for TB. Further large-scale and well-designed articles are still needed to validate this result. DOI: https://dx.doi.org/10.4314/ahs.v19i1.2 Cite as: Zhen L-B, Sun Y-P, Chen Y-Y, Yin L-S. IL-18 polymorphisms and tuberculosis susceptibility: a meta-analysis. Afri Health Sci. 2019;19(1): 1311-1320. https://dx.doi.org/10.4314/ahs.v19i1.