●: Experiment●: 実験結果 ▲: Simulation▲: 数値結果)stinu .bra( ytisnenI LP6543210tSignificant enhancement of light emissionby metal/semiconductor nanostructuresIllustrationDependenceofthecriticalcurrentdensityonthemaximumrepulsiveforceTimeevolutionofthemagneticfluxlinesandtheshieldingcurrentdensityStanding wave surface plasmonDevelopment of nanostructure-based optical devicesw/ Au500600Wavelength (nm)52Theoretical investigation of novel optical functionalityOptical state control based on plasmonics and nanophotonicsElectric field Ex(V/m)AgGaND=140 nmL=200 nmMetal/semiconductorhybrid nanostructuresabove-mentionedtechniquePlease put your photograph. Appealing point：Special objectivesWetovarious We can apply the above-mentioned technique to various luminescentmaterialsystemsbothexperimentallyandtheoretically.luminescent material systems both experimentally and theoretically. Yamagata UniversityGraduate School of Science and Engineering Research Interest ：Semiconductor opticsYamagata University Graduate School of Science and EngineeringNanostructure physicsE-mail ：t-oto@yz.yamagata-u.ac.jpResearch InterestTel ：+81-238-26-3105Semiconductor optics Nanostructure physicscanapplytheInmystudy,noncontactmeasurementmethodsofacriticalcurrent In my study, noncontact measurement methods of a critical densityinhigh-temperaturesuperconductors(HTSs)thinfilmhavecurrent density in high-temperature superconductors (HTSs) beennumericallyreproducedbysolvingthetime-evolutionproblemthin film have been numerically reproduced by solving the Forsimulatingtheofashieldingcurrentdensityinthefilm.time-evolution problem of a shielding current density in the noncontactmethodsofthecriticalcurrentdensityintheHTSfilm,film. For simulating the noncontact methods of the critical theFEMcodeforimplementingthehighperformancemethods(acurrent density in the HTS film, the FEM code for high-speedmethodofthesimultaneousordinarydifferentialimplementing the high performance methods (a high-speed equations,theevaluationmethodwiththehighaccuracyofthemethod of the simultaneous ordinary differential equations, the evaluation method with the high accuracy of the improperintegral,andtherelaxationmethodoftheJ-Econstitutiveimproper integral, and the relaxation method of the J-E equation)hasbeendeveloped.Byusingthecode,theresolutionofconstitutive equation) has been developed. By using the thenoncontactmethodshasbeencalculated.Inaddition,code, the resolution of the noncontact methods has been detectabilityofthecracksinthefilmhasbeeninvestigated.calculated. In addition, detectability of the cracks in the film has been investigated.Appealingpoint：Asourfuturework,weconsidertheimplementationoftheSpecial objectivestopologyoptimizationtechniqueinournumericalcodeforthehigh- As our future work, we consider the implementation of the temperaturesuperconductingdevices.Asaresult,itispossibletotopology optimization technique in our numerical code for presentadesignproposalformaximizingitsperformance.the high-temperature superconducting devices. As a result, it is possible to present a design proposal for maximizing its performance.Yamagata UniversityGraduate School of Science and Engineering Research Interest ：Simulation scienceYamagata University Graduate School of Science and Engineering E-mail ：takayama@yz.yamagata-u.ac.jpResearch InterestTel ：+81-238-26-3162Simulation scienceFax：+81-238-26-3789E-mail ・ takayama@yz.yamagata-u.ac.jpTel ・ +81-238-26-3162Fax ・ +81-238-26-3789HP ：http://emperor.yz.yamagata-u.ac.jp/~t_laboHP・ http://emperor.yz.yamagata-u.ac.jp/~t_laboContentContent：LEDandlasers(LDs)aresolid-stateopticaldevices,whichhavea LED and lasers (LDs) are solid-state optical devices, which lotofadvantagessuchastheirlowenergyconsumption,longhave a lot of advantages such as their low energy consumption, long lifetime, and low cost. Although the lifetime,andlowcost.AlthoughtheapplicationofLEDsandLDsisapplication of LEDs and LDs is extended, their emission extended,theiremissionefficienciesarestillinsufficientforgreen-efficiencies are still insufficient for green-to-red and to-redandultravioletregions.ultraviolet regions. Inourlaboratory,wepromotesemiconductorand/ormetalbased In our laboratory, we promote semiconductor and/or metal nanostructureswithatypicalsizeof10or100nmorder.Bybased nanostructures with a typical size of 10 or 100 nm order. By introducing the nanostructural effects to introducingthenanostructuraleffectstosemiconductorbasedopticalsemiconductor based optical devices and controlling the devicesandcontrollingthelightstatesbytheadjustmentoflight states by the adjustment of nanostructural shape and nanostructuralshapeandperiodicarrangement,wefabricatetheperiodic arrangement, we fabricate the optical devices with opticaldeviceswithnovelopticalfunctionality.novel optical functionality. Our technique can be applied to various luminescent Ourtechniquecanbeappliedtovariousluminescentmaterialmaterial systems. By developing comprehensive methods to systems.Bydevelopingcomprehensivemethodstoenhanceenhance emission efficiencies for materials difficult to emit emissionefficienciesformaterialsdifficulttoemitlighteffectivelylight effectively in principle, we will plan to design novel inprinciple,wewillplantodesignnovelopticaldeviceapplications.optical device applications.w/o Au700E-mail ・ t-oto@yz.yamagata-u.ac.jpTel ・ +81-238-26-3105HP ：http://oto-lab.yz.yamagata-u.ac.jp/HP・http://oto-lab.yz.yamagata-u.ac.jp/Development of light emitters based on semiconductor/metal nanostructuresDevelopment of light emitters based on semiconductor/metal nanostructuresAssistant Professor Takao OtoAssistant Professor Takao OtoHigh performance analysis and its applications of shielding current density in High performance analysis and its applications of shielding current density in high-temperature superconducting thin film high-temperature superconducting thin film Assistant professor Teruou TakayamaAssistant professor TeruouTakayamaContent：Content
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