简介：使用RF-PECVD法分别在基底温度为60℃、120℃和200℃的N型单晶锗表面制备了α-C：H膜,采用拉曼光谱、傅里叶变换红外吸收光谱和原子力显微镜等技术手段研究分析了α-C：H膜的价键组成及表面形貌,讨论了基底温度对α-C：H膜微结构及部分性能的影响。结果表明,在α-C：H膜沉积过程中,基底温度对膜层微观结构有较大影响,基底温度60℃时,膜层表面光滑、致密无石墨化现象。随着基底温度的升高,α-C：H膜中含H量和微晶石墨量逐渐增多,α-C：H膜层性能也逐步退化。

简介：为满足性能良好、运行稳定、精度高的触摸屏在嵌入式系统中的广泛应用，提出了一种嵌入式系统的触摸屏驱动设计，这种方案基于S3C2410微处理器与触摸屏的硬件接口在嵌入式UCOS操作系统中的软件驱动实现，采用外部晶体管连接触摸屏到S3C2410的接口电路，并利用S3C2410的等待中断模式和自动X-Y坐标转换工作模式，读出与X-Y坐标有关的电压值。高效地完成了触摸状态的检测以及触摸数据的转换，其实现方法具有简便高效，易于实现等特点。

简介：SiO_2thinfilmscontainingSi_(1-x)Ge_xquantumdots(QDs)arepreparedbyionimplantationandannealingtreatment.Thephotoluminescence(PL)andmicrostructuralpropertiesofthinfilmsareinvestigated.ThesamplesexhibitstrongPLinthewavelengthrangeof400—470nmandrelativelyweakPLpeaksat730and780nmatroomtemperature.Blueshiftisfoundforthe400-nmPLpeak,andtheintensityincreasesinitiallyandthendecreaseswiththeincreaseofGe-dopingdose.Weproposethatthe400—470nmPLbandoriginatesfrommultipleluminescencecenters,andthe730-and780-nmPLpeaksareascribedtotheSi=OandGeOluminescencecenters.

简介：日本松下技术研究公司研制出把si超微粒子作为激活区的室温可见发光器件。在真空稀有气体中进行以单晶si为靶的脉冲激光沉积，在基板上以层状沉积气相生长的si超微粒子，然后进行热氧化，形成被表面氧化膜所覆盖的Si超微粒子聚合体。

简介：ByusingPDM-OFDM-16QAMmodulation,all-Ramanamplification,coherentdetection,and7%forwarderrorcorrection(FEC)threshold,wesuccessfullydemonstrate63-Tb/s(368×183.3-Gb/s)signalover160-kmstandardsinglemodefiber(SSMF)transmissionintheC-andL-bandswith25-GHzchannelspacing.368opticalchannelswithbandwidthspacingof25GHzaregeneratedfrom16externalcavitylasersources.After160-kmSSMFtransmission,alltestedbiterrorrate(BER)areunder3.8×10-3,whichcanberecoveredby7%FECthreshold.Withineachchannel,weachievethespectralefficiencyof6.85bit/s/HzinC/Lband.

简介：Siliconnanoconearrayswithmetalsilicide(FeandCr)-enrichedapexesarefabricatedonSi(100)substratebytheAr+ionbombardmentmethod.Thenanoconearraysshowexcellentfieldemissionproperties.Ahighcurrentdensity(J)of～0.33mA/cm2underafieldof～3V/μm,averylowturn-onfieldof～1.4V/μm,andaverylargeenhancementfactorof～9466arealsoobtained.TheemissionJofSinanoconearraysremainsextremelystableforlongperiodsoftime(24h).

简介：Hybridoctagonal-ringmicrolasersareinvestigatedforrealizingastableoutputfromasiliconwaveguidebasedonatwo-dimensionalsimulation.Theinnerradiusoftheringisoptimizedtoachievesingle-modeandlow-thresholdoperation.Usingthedivinylsiloxane-benzocyclobutene(DVS-BCB)bondingtechnique,ahybridAlGaInAs/Sioctagonal-ringmicrolaserverticallycoupledtoasiliconwaveguideisfabricatedwithasidelengthof21.6μmandaninnerradiusof15μm.Asingletransverse-modeoperationisachievedwithathresholdcurrentdensityof0.8kA∕cm~2andaside-modesuppressionratioabove30dB,andastableoutputfromthelowersiliconwaveguideisobtained.

简介：设计了一种阵列波导光栅解调集成系统中的8通道Si纳米线阵列波导光栅波分复用器。根据材料的折射率设计了单模波导截面尺寸,利用光束传播法对所设计阵列波导光栅进行了模拟。结果表明,器件尺寸为200μm×219μm,远小于目前技术较成熟的硅基SiO2的尺寸,光功率分布符合高斯分布,信道间隔为1.8nm,串扰小于-21dB。对小尺寸AWG的设计具有参考意义。

简介：AseriesofAlx-(Alq3)1-xgranularfilmsispreparedonSiwaferwithnativeoxidelayerusingco-evaporationtechnique.Largelateralphotovoltaiceffect(LPE)isobserved,withanoptimalLPVsensitivityof75mV/mminx=0.35sample.ThedependenceofLPEontemperatureandAlcompositionisinvestigated,andthepossiblemechanismisdiscussed.

简介：对原子自发辐射现象的研究使人们能够从本质上认识光与物质之间相互作用过程,自原子共振荧光发现以来,对共振荧光的操控就一直是一个非常重要的课题。对原子荧光进行抑制可以使原子态存储的信息保存尽可能长的时间,而对原子荧光进行锐化可以使得其中的信息能够更高效、更精确地被人们所接受。对从共振荧光发现开始的有关荧光的抑制与锐化的工作进行了汇总,并提出了一个该领域未来可能的发展方向。该领域的研究成果可以显著提升量子导航和量子精密测量的探测精度和效率。

简介：Inthispaper,wederivethebrightanddarkphotonnumberstatesforspatialinterferenceoftwoormorelightbeamsandsucceedintheexplanationofYoung'sinterferenceexperiment,andalsoachieveabettercomprehensionofthewellknowncommentofDirac"eachphotononlyinterferenceswithitself".Fromthefullyquantumpointofview,theoriginoftheinterferencefringesconsistsinthemodetransformationandthedetectionofdouble-slitstates.

简介：Anexperimentofadaptivepolarizationmodedispersion(PMD)compensationfor40-Gb/sreturn-to-zero(RZ)opticalcommunicationsystemisreported.Intheexperiment,degreeofpolarization(DOP)isusedasfeedbacksignalandparticleswarmoptimization(PSO)methodisadoptedaslogiccontrolalgorithm.Thecompensationtimeisabout200ms,thecompensateddifferentialgroupdelay(DGD)isupto30ps,andbiterrorrate(BER)of10^-9isreachedwhenPMDcompensationisemployed.

简介：荧光共振能量转移（FRET）技术作为一种能在生物活体和体外检测纳米级距离变化的工具，为研究生物大分子内部结构、性质、反应机理及其动态监测，乃至定量分析等提供了一条快速简便的途径。由于量子点（QDs）具有独特的光学性质（宽吸收、窄发射、抗光漂白及荧光可调），近年来基于QDs的FRET体系已在生物医学传感、免疫及活细胞内生物大分子的相互作用方面得到了广泛应用。

简介：Anewscreen-spotimagingmethodbasedonopticalmeasurementisproposed,whichisapplicabletotheclose-rangemeasurementofaircraft'sthree-dimensional(3D)attitudeparameters.Lasertrackerisusedtofinishtheglobalcalibrationsofthehigh-speedcamerasandthefixedscreensontestsite,aswellastoestablishmedia-coordinate-framesamongvariouscoordinatesystems.Thelasercooperationobjectmountedontheaircraftsurfaceprojectslaserbeamsonthescreensandthehigh-speedcamerassyn-chronouslyrecordthelight-spots'positionchangingwithaircraftattitude.Therecordedimagesequencesareusedtocomputetheaircraftattitudeparameters.Basedonthematrixanalysis,theerrorsourcesofthemeasurementaccuracyareanalyzed,andthemaximumrelativeerrorofthismathematicalmodelisestimated.Theexperimentalresultshowsthatthismethodeffectivelymakesthechangeofaircraftpositiondistinguishable,andtheerrorofthismethodisnomorethan3′whiletherotationanglesofthreeaxesarewithinacertainrange.

简介：WhenfemtosecondlaserpulsesinterferewithchirpedfemtosecondlaserpulsesinAs2S3fiber,achirpedfibergratingisformed.Ananalyticalexpressionisgiventodescribethechirpedgrating,anditsBraggreflectivityiscalculated.BecauseofthehighphotosensitiveeffectofAs2S3material,thechirpedfibergratinghasawideBraggreflectivespectrumandhighreflectivitybychoosingproperparameters.Thisindicatesthatthechirpedfibergratingcanbeusedasastretcherinthefemtosecondchirpedpulseamplification(CPA)system.

简介：Wereportthefabricationofsubmicrometerpitsarray(SP-array)on6H-SiCsurfacebytheinterferenceoftwofemtosecondlaserbeams.FormationmechanismsandopticalabsorptionofSP-arrayarestudied.Therelativereflectivityandtransmissivityofwhitelightdecreaseto10%ofthevaluesofSiCcrystal,andtheopticalabsorptionisenhancedto97%.Therelativereflectivityandtransmissivityofincidentangleswithintherangeof20°-60°arekeptbelow25%.TheenhancementmechanismofopticalabsorptionoftheSP-arrayisalsodiscussed.

简介：由中科院安徽光机所承担的“863”计划新材料领域项目中的课题——中远红外非线性光学晶体硒镓银的研制日前取得重要进展。科研人员不仅成功地加工出长10毫米至20毫米的红外倍频元件，而且实现了连续CO2激光倍额。参加鉴定的专家们认为，该晶体的主要拄术指标已居国内领先水平。

简介：Aquasi-cycliclow-densityparitycheck(QC-LDPC)codeisconstructedbyanimp

简介：Weexperimentallydemonstrateall-opticalclockrecoveryfor100Gb/sreturn-to-zeroon–offkeyingsignalsbasedonamonolithicdual-modedistributedBraggreflector(DBR)laser,whichcanrealizebothmodespacingandwavelengthtuning.Byusingacoherentinjectionlockingscheme,a100GHzopticalclockcanberecoveredwithatimingjitterof530fs,whichisderivedbyanopticalsamplingoscilloscopefromboththephasenoiseandthepowerfluctuation.Furthermore,fordegradedinjectionsignalswithanopticalsignal-to-noiseratioaslowas4.1dBanda25kmlongdistancetransmission,good-qualityopticalclocksareallsuccessfullyrecovered.

简介：Anovelmethodfordistortion-freeopticalpulsetransmissionistheoreticallyproposedandsimulated,inwhichtwotimelensesformedbydispersionfibersandquadraticphasemodulationsareutilized.OneisusedasanopticalinverseFouriertransformation(OIFT)devicetotransformtheinitialtime-domaindatatofrequency-domainoneatthetransmitterandtheotherasanopticalFouriertransformation(OFT)devicetorecoverthedataatthereceiver.Byusingtheunchangedspectralenvelopeinlinearopticalfibercommunication,theinitialdatacanberecovered.Throughsimulations,a10×100Gb/sintensitymodulateddirect-detection(IM-DD)densewavelengthdivisionmultiplexing(DWDM)systemover2000kmtransmissionwithoutthecompensationforpolarizationmodedispersion(PMD)anddispersionslopeisachieved,whichcanbeusedtoupgradethecurrent10-Gb/sIM-DDsystemtoa100-Gb/sonedirectly.