简介：有扭曲的nematic液体水晶层的一个悦耳的photonic水晶过滤器被建议。有改变事件角度的缺点模式系列被4详细讨论

简介：Weintroduceanewmodelofone-dimensional(1D)photoniccrystalcomposedofalternatelyarrangedRHMandLHMlayerswithpositiveandnegativerefractiveindicesrespectively,forwhichthetransmissionspectraofthemodelarecalculatednumericallywiththetransfermatrixmethod,andtheband-gapstructureandthepolarizationpropertiesareanalyzed.Wefoundthattheintroductionofnegativerefractiveindexlayers(i.e.LHMmediumlayers)givesrisetosomepeculiarband-gapstructureandpolarizationpropertiesasfollows.Firstly,theforbiddenbandsareextremelywideandthetransmissionbandsareverysharpwithoutoscillation;andsecondly,thechangeofincidentanglehasdifferentinfluencesontheforbiddenbandsofTEandTMmodes.FortheTMmode,theforbiddenbandwidthdecreasessubstantiallyandfinallyvanishes,andfortheTEmodewithcentralwavelength,thetotalreflectionhappensatanyincidentangle.

简介：Thereflectivityofone-dimensionalchalcogenidephotoniccrystal(CGPC)structurewiththefirstorderreflectionbandinnearinfrared(NIR)regionistheoreticallystudied.Sb-SeandGe-Schalcogenideglassesareusedashighandlowrefractiveindexlayersrespectively,becausethesematerialshavezeroabsorptioninNIRregion.Thetransfermatrixmethod(TMM)isemployedtocalculatethereflectivespectraoftheproposedstructure.ThetheoreticalresultsofreflectivespectraofbulkchalcogenidematerialswiththecompositionofSb40Se60andGe30S70for4,8,12and15layersandthicknessesof117nmand183nmrespectively,atnormalincidence,arecloseagreementwiththeexperimentalresults.Furthermore,byincreasingthenumberoflayersofSb40Se60andGe30S70,thereflectionbandscanbeenhancedinthewiderrangeoftheNIRregionforthepolarizationatdifferentanglesandthusthebroadbandomnidirectionalreflectorcanbedesigned.

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简介：一个简单二节的极化模式分散(PMD)赔偿者为多信道的PMD赔偿被建议，它能补偿二或甚至更多的隧道同时。因为统计特征和PMD的频率依赖，为有中等PMD的当前的单个模式纤维，所有隧道严重地同时被降级的概率是极其小的，它使补偿稠密的波长部门multiplexing(DWDM)可能有用这个赔偿者的中等PMD的传播系统。它被显示出停止概率一40?????$

简介：数字模拟与沟在一个维的Ag电影单身者裂缝结构的光传播改进性质上被执行了。结果证明沟的位置，深度和数字在光传播上有大影响，并且出现电浆子电磁声子和回声模式是主要因素。35.8dB的最大的扑灭比率被调整沟深度在单个裂缝结构完成。