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1、Letterpubs.acs.org/NanoLettOptomechanicalEnhancementofDoublyResonant2DOpticalNonlinearity§§§§§∥FeiYi,MingliangRen,JasonC.Reed,HaiZhu,JiechangHou,CarlH.Naylor,§,∥§,†,‡,§A.T.CharlieJohnson,RiteshAgarwal,andErtugrulCubukcu*†‡DepartmentofNanoengineeringandDepartmentofElectr
2、icalandComputerEngineering,UniversityofCalifornia,SanDiego,LaJolla,California92093,UnitedStates§∥DepartmentofMaterialsScienceandEngineering,DepartmentofPhysicsandAstronomy,UniversityofPennsylvania,Philadelphia,Pennsylvania19104,UnitedStates*SSupportingInformationABSTRAC
3、T:Emergingtwo-dimensionalsemiconductorma-terialspossessagiantsecondordernonlinearresponseduetoexcitoniceffectswhilethemonolayerthicknessofsuchactivematerialslimitstheiruseinpracticalnonlineardevices.Here,wereport3300timesoptomechanicalenhancementofsecondharmonicgeneratio
4、nfromaMoS2monolayerinadoublyresonanton-chipopticalcavity.Weachievethisbyengineeringthenonlinearlight-matterinteractioninamicroelectro-mechanicalsystemenabledopticalfrequencydoublingdevicebasedonanelectrostaticallytunableFabry−Perotmicroresonator.Ourversatileoptomechanic
5、alapproachwillpavethewayfornextgenerationefficienton-chiptunablelightsources,sensors,andsystemsbasedonmolecularlythinmaterials.KEYWORDS:Molybdenumdisulfide,2Dmaterials,nonlinearoptics,secondharmonicgeneration,optomechanicsNonlinearopticalmaterialshavemadepossibleaplethoran
6、onlinearlightgenerationbymorethan3ordersofmagnitude.ofwavelengthtunablecoherentlightsourcescrucialinThedeviceisbasedonavoltagecontrolledwidelytunablemanyapplicationsextendingfrombioimagingtolasermicro-Fabry−Perot(FP)cavitythatconsistsofaspectrallymachining.Recentstudies
7、onmonolayercrystalsofmolybde-selectivedielectricdistributedBraggreflector(DBR)mirrornumdisulfide(MoS2)thatlackinversionsymmetryhaveandavoltagedeformablesilvermirrorfabricatedonasiliconconfirmedthattheypossessagiantsecondordernonlinearnitridemembraneasshowninFigure1a.Figure
8、1bshowsthe1−7opticalresponse.However,thesubnanometerinteractionmultilayerstackarrangementusedinourcalculations
