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Influence of Unidirectional Tensile External-loading on Electromagnetic Property of the Perforated Frequency Selective Surface Illuminated by Electromagnetic Wave Incident at Arbitrary Angles

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Journal of Shanghai Jiaotong university(Science) 2010年第1期15卷 94-102页

作者：张立军王德禹朱锡张凌江 State Key Laboratory of Ocean Engineering Shanghai Jiaotong University Department of Ship and Ocean Engineering Navy University of Engineering Naval Academy of Armament

That whether unidirectional tension changes the influence of incident angle on FSS's(frequency selective surface) electromagnetic(EM) property and whether incident angle changes the effect of unidirectional intension on FSS's EM property is *** pattern and magnitude of these changes are ***,the analyses for the mechanism of unidirectional tension's influence and the mechanism of the coupling between the influences of unidirectional tension and incident angle are ***,according to the mechanism of these influences,Mechanics-Electromagnetics co-analysis is conducted based on mechanics finite element method and electromagnetics finite element *** frequency responses of the FSS which is under different unidirectional tensions and illuminated by EM wave incident at different angles are *** concept"unidirectional tensile sensitivity of FSS"is put forward along with two unidirectional tensile sensitivity *** using angular sensitivity-factor and unidirectional tensile sensitivity-factor,the influences of unidirectional tension and incident angle,which are coupled with each other,are expatiated *** results show that these influences have two ***,basing on Mode Matching Method and according to the results of numerical investigation,one principle for the layout of FSS with apertures is *** suggestions for further research are given.

关键词： frequency selective surface (FSS) radar absorbing structure unidirectional tensile sensitivity angular sensitivity mechanics-electromagnetics co-analysis composite ship integrated mast

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Design of an Optical Water Pollution Sensor Using a Single-Layer Guided-Mode Resonance Filter

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Photonic Sensors 2013年第3期3卷 224-230页

作者： Edward SADER Abdallah SAYYED-AHMAD Department of Physics Birzeit University Birzeit Palestine

The optical characteristics of a simple, planar, single layer, dielectric Mg-based guided mode resonance filter （GMRF） were investigated by means of rigorous-coupled wave analysis （RCWA）. This filter has great potential for real-life applications, especially as bio- and environmental sensors. The structure of the proposed sensor is compact, and all of its layers can be grown in a single process. In this paper, we present results on the design of a water pollution sensor in the violet region of the visible spectrum. The spectral and angular sensitivities of the sensor for both the transverse electric （TE） and transverse magnetic （TM） polarization modes were estimated and compared for various regions in the violet spectrum. A spectral response characterized with a narrow bandwidth and low reflection side bands was realized by carrying out extensive parameter search and optimization. Optimal spectral and angular sensitivities were found for the sensor with a grating thickness of 100nm in the TM polarized mode where we found them to be 100nm and 40 degrees, per index refraction unit, respectively.

关键词： Diffractive optics guided waves filters sensors spectral sensitivity angular sensitivity

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