学科分类
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55 个结果
  • 简介:Anall-opticallight–control–lightfunctionalitywiththestructureofamicrofiberknotresonator(MKR)coatedwithtindisulfide(SnS2)nanosheetsisexperimentallydemonstrated.TheevanescentlightintheMKR[witharesonanceQof~59,000andanextinctionratio(ER)of~26dB]isexploitedtoenhancelight–matterinteractionbycoatingatwo-dimensionalmaterialSnS2nanosheetontoit.Thankstotheenhancedlight–matterinteractionandthestrongabsorptionpropertyofSnS2,thetransmittedopticalpowercanbetunedquasi-linearlywithanexternalvioletpumplightpower,whereatransmittedopticalpowervariationrateΔTwithrespecttothevioletlightpowerof~0.22dB∕mWisobtained.Inaddition,theMKRstructurepossessingmultipleresonancesenablesadirectexperimentaldemonstrationoftherelationshipbetweenresonanceproperties(suchasQandER),andtheobtainedΔTvariationratewithrespecttothevioletlightpower.ItverifiesexperimentallythatahigherresonanceQandalargerERcanleadtoahigherΔTvariationrate.Intermsoftheoperatingspeed,thisdevicerunsasfastas~3.2ms.Thiskindofall-opticallight–control–lightfunctionalstructuremayfindapplicationsinfutureall-opticalcircuitry,handheldfibersensors,etc.

  • 标签: response fast experimental optical multiple PUMP
  • 简介:利用拉曼光谱研究了He^2+注入六方SiC晶体样品时的损伤缺陷随注量的变化关系,并采用直接碰撞/缺陷模拟模型与多级损伤累积模型,模拟了室温及723,873,1023K下晶体样品的无序度随注量的变化关系。测试结果表明:随着注量的增加,晶体样品无序度增大,样品的拉曼特征峰强度减小。

  • 标签: 碳化硅 离子注入 拉曼光谱 损伤累积
  • 简介:ThenovelverticallystandingPtSe2filmontransparentquartzwaspreparedbyselenizationofplatinumfilmdepositedbythemagnetronsputteringmethod,andanNd:LuVO4passivelymode-lockedsolid-statelaserwasrealizedbyusingthefabricatedPtSe2filmasasaturableabsorber.TheX-raydiffractionpatternandRamanspectrumofthefilmindicateitsgoodcrystallinitywithalayeredstructure.ThethicknessofPtSe2filmismeasuredtobe24nmaccordingtothecross-sectionheightprofileoftheatomicforcemicroscopeimage.High-resolutiontransmissionelectronmicroscopyimagesclearlydemonstrateitsverticallystandingstructurewithaninterlayerdistanceof0.54nmalongthec-axisdirection.Themodulationdepth(AT)andsaturationfluence(Фs)ofPtSe2filmaremeasuredtobe12.6%and17.1μJ/cm2,respectively.Theobtainedmode-lockedlaserspectrumhasacentralwavelengthof1066.573nm,witha3dBbandwidthof0.106nm.Thetransformlimitedpulsewidthofthemode-lockedlaserwascalculatedtobe15.8ps.Amaximumaverageoutputpowerof180mWwithaworkingrepetitionrateof61.3MHzisobtained.Tothebestofourknowledge,thisisthefirstreportofthegenerationofultrafastmode-lockedlaserpulsesbyusinglayeredPtSe2asasaturableabsorber.

  • 标签: 磁控溅射法 通信技术 理论研究 发展现状
  • 简介:与黄金和氧化铁nanoparticles并且与silibinin装载的PEGylated-PLGA随机的nanofibrous膜被electrospinning免职准备。nanofibrous膜能遥远地被控制并且由一盏激光灯或磁场激活在需求上释放生物代理人。nanosystems用扫描电子显微镜学被描绘,红外线的光谱学,原子磁性的回声光谱学,和thermogravimetric分析的Fourier变换。装载效率和药内容百分比的药被紫外力的光吸收光谱学决定。nanofibrous膜由相对低紧张的激光照耀或由一个磁场刺激了为至少60h显示出持续silibinin版本,没有爆炸效果。建议便宜electrospinning过程能够集合,经由一个一步舞过程,有外部地为控制的药交货要激活的金属性的nanoparticles的刺激应答的装载药的nanosystem。

  • 标签: 装载效率 交货 扫描电子显微镜 FOURIER 应用
  • 简介:因为graphene和phosphorene,二维(2D)组IV和组V元素的分层的材料引起大兴趣。然而,组IVV单层没收到到期的注意。在这个工作,啜单层的三种类型计算地被设计探索他们的电子结构和光性质。计算证实这些单层的稳定性,它都是有在范围的bandgaps的indirect-bandgap半导体1.382.21eV。bandgaps在pH=跨骑水的氧化还原作用潜力0,用作watersplitting光催化剂显示单层的潜力。计算光性质证明啜2D材料的某些单层是可见的光的吸收器并且将用作optoelectronic设备的好候选人。

  • 标签: 电子结构 光催化剂 单层 2D 可见光 混合物