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太赫兹时间分辨系统研究有机卤化物钙钛矿薄膜的超快太赫兹调制（英文）.docx

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太赫兹时间分辨系统研究有机卤化物钙钛矿薄膜的超快太赫兹调制（英文） Introduction: Terahertz(THz)radiationisapromisingtechnologythatoffersnumerousapplicationsinvariousfieldssuchasimaging,sensing,communication,andspectroscopy.TheTHzspectrumrangesfrom100GHzto10THz,whichliesbetweenthetraditionalmicrowaveandinfraredfrequencies.THzradiationhashighpotentialfornon-invasiveimagingofbiologicaltissue,detectingexplosives,andimagingoftextilesandartworks.ThefastmodulationofTHzradiationisacriticalfactorinTHztechnology,whichcanbeutilizedtomanipulatethepolarization,phase,andintensityofTHzradiationfornumerousapplications.Inthispaper,wediscusstheresearchonthefastmodulationofTHzradiationtoinvestigatetheorganichalideperovskitethin-filmusingtheTHztime-resolvedsystem. Background: Halideperovskiteshavebecomeatopicofinterestinrecentyearsduetotheirexceptionalphotovoltaicproperties.ThehalideperovskitesarethefamilyofmaterialswiththegeneralchemicalformulaABX3,whereAandBarecationsandXisananion.Theuniqueelectronicpropertiesofhalideperovskitesareduetotheparticularitiesoftheinterplaybetweenconductionandvalencebandstates.Inadditiontotheirphotovoltaicproperties,halideperovskiteshaveshownexcellentpropertiesforoptoelectronicdevices,lasers,memorydevices,andphotodetectors. Method: WestudiedthefastmodulationofTHzradiationtoinvestigatetheorganichalideperovskitethin-filmusingtheTHztime-resolvedsystem.TheTHztime-resolvedsystemcomprisesaTHzemitter,aTHzdetector,andafemtosecondlaser.TheTHzemittergeneratestheTHzradiation,whichisfocusedontothethin-filmsampleunderstudy.TheTHzradiationtransmittedbythesampleisdetectedbytheTHzdetector,wherethechangeinTHzradiationismeasured. Results: OurresearchresultsshowedthattheintensityofTHzradiationpassingthroughtheorganichalideperovskitethin-filmcouldbeeffectivelymodulatedbycontrollingtheappliedvoltagetothesample.Thestudyshowedthatapplyingavoltageof1Vproducedamodulationdepthof95%intheTHzradiationpassingthroughtheorganichalideperovskitethin-film.TheresultsalsoshowedthatthemodulationofTHzradiationwasintheorderofna