简介:Pockel’seffectandopticalrectificationinducedbythebuilt-inelectricfieldinthespacechargeregionofasiliconsurfacelayeraredemonstratedina{001}-cuthigh-resistancesiliconcrystal.Thehalf-wavevoltageisabout203V,deducedbyPockel’seffect.TheratioX2zxxX2zzziscalculatedtobeabout0.942accordingtoopticalrectification.OurcomparisonwiththeKerrsignalshowsthatPockel’ssignalismuchstronger.Thisindicatesthattheseeffectsaresoconsiderablethattheyshouldbetakenintoaccountwhendesigningsilicon-basedphotonicdevices.
简介:摘要:石场生产碎石计算碎石量需要用到岩石碎胀系数这个参数。如现场测量这个参数,因现场测量条件有限,测量过程、步骤也无法规范、严格控制,造成测量结果不是很准确。而室内测试岩石碎胀系数目前还没有规范的方法。根据多年建设用石料及碎石的工作实践探讨在室内测试岩石碎胀系数的可行性分析。
简介:<正>YiWu,locatedincentralZheJiangProvinceonChina’ssoutheastcoast,300kilometersawayfromShanghai,hasatotalareaof1105squarekilometersandapopulationof2.2million.Itisreputedtobeaninternationalcenterforsmallcommoditycirculation,demonstrationand