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12 Apr 2004

Volume 84, Issue 15, pp. 2721-2955

Issue Cover Spotlight Figure

Appl. Phys. Lett. 84, 2883 (2004); http://dx.doi.org/10.1063/1.1702137 (3 pages)

Pu Xian Gao and Zhong L. Wang
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Electric coupling to the magnetic resonance of split ring resonators

N. Katsarakis, T. Koschny, M. Kafesaki, E. N. Economou, and C. M. Soukoulis

Appl. Phys. Lett. 84, 2943 (2004); http://dx.doi.org/10.1063/1.1695439 (3 pages) | Cited 166 times

Online Publication Date: 7 April 2004

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We study both theoretically and experimentally the transmission properties of a lattice of split ring resonators (SRRs) for different electromagnetic (EM) field polarizations and propagation directions. We find unexpectedly that the incident electric field E couples to the magnetic resonance of the SRR when the EM waves propagate perpendicular to the SRR plane and the incident E is parallel to the gap-bearing sides of the SRR. This is manifested by a dip in the transmission spectrum. A simple analytic model is introduced to explain this interesting behavior. © 2004 American Institute of Physics.
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84.40.Az Waveguides, transmission lines, striplines
76.20.+q General theory of resonances and relaxations
41.20.Jb Electromagnetic wave propagation; radiowave propagation

Gap-gate field effect gas sensing device for chemical image generation

D. Filippini, I. Lundström, and H. Uchida

Appl. Phys. Lett. 84, 2946 (2004); http://dx.doi.org/10.1063/1.1703838 (3 pages) | Cited 3 times

Online Publication Date: 7 April 2004

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A field effect chemically sensitive device, specially suited for the generation of scanning light pulse technique chemical images, is demonstrated. The present approach provides a complete separation between the required electrical biasing and chemical sensing functions inherently coupled in all previous systems. The concept is demonstrated by sensing hydrogen with insensitive biasing electrodes, composing a so-called gap gate, combined with discontinuous palladium clusters usually unsuitable for sensing in conventional arrangements. A simple one-dimensional model is used to explain the observed behavior. © 2004 American Institute of Physics.
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07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
72.40.+w Photoconduction and photovoltaic effects
07.05.Pj Image processing

Methodology for interference analysis using electromagnetic topology techniques

Phumin Kirawanich, Rahul Gunda, Nakka S. Kranthi, Jeffery C. Kroenung, and N. E. Islam

Appl. Phys. Lett. 84, 2949 (2004); http://dx.doi.org/10.1063/1.1704860 (3 pages) | Cited 4 times

Online Publication Date: 7 April 2004

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For simulation codes based on the electromagnetic topology theory, a method to characterize electromagnetic interference and interactions between an external source and internal circuitry of a semi-shielded system is described. Simulation results based on this technique compare well with previously measured data. Analysis also shows that the high-frequency resonances on the cable voltage and current depend on the length of the cable and its termination impedances. © 2004 American Institute of Physics.
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07.50.Hp Electrical noise and shielding equipment

Band gaps and localization of water waves over one-dimensional topographical bottoms

Zhong An and Zhen Ye

Appl. Phys. Lett. 84, 2952 (2004); http://dx.doi.org/10.1063/1.1695200 (3 pages) | Cited 8 times

Online Publication Date: 7 April 2004

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In this article, the phenomenon of band gaps and Anderson localization of water waves over one-dimensional periodic and random bottoms is investigated by the transfer matrix method. The results indicate that the range of localization in random bottoms can be coincident with the band gaps for the corresponding periodic bottoms. Inside the gap or localization regime, a collective behavior of water waves appears. The results are also compared with acoustic and optical situations. © 2004 American Institute of Physics.
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47.35.-i Hydrodynamic waves
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