Yuav Ua Li Cas Manipulate Teeb Siv Metamaterials?

Metamaterials yog cov khoom siv tsim khoom tsim nrog cov khoom tshwj xeeb uas tsim los cuam tshuam nrog electromagnetic nthwv dej hauv txoj kev sib txawv ntawm cov khoom siv ib txwm muaj. Ib qho kev cog lus zoo tshaj plaws ntawm cov khoom siv metamaterials yog kev siv lub teeb, muab kev tswj tsis tau pom dua los ntawm nws tus cwj pwm.
Daim ntawv no tshawb txog kev tsim thiab tsim cov khoom siv metamaterials uas tswj lub teeb, delving rau hauv lawv cov hauv paus, kev nce qib tsis ntev los no, thiab cov ntawv siv tau.
Dab tsi yog metamaterials?
Thaum cov khoom siv pa sib cuam tshuam nrog lub teeb raws li lawv cov khoom siv hauv nruab nrab xws li qhov ntsuas qhov ntsuas pom thiab qhov nqus, cov khoom siv metamaterials muab lawv cov khoom kho qhov muag los ntawm lawv cov txheej txheem sub-wavelength, uas tau ua tib zoo tsim kom pom cov lus teb tshwj xeeb electromagnetic, tso cai rau kev tswj xyuas lub teeb ntawm lub teeb. lub nanoscale.
Tus txheej txheem tsim
Lub geometry, kev npaj, thiab muaj pes tsawg leeg ntawm lawv cov qauv subwavelength txiav txim siab cov khoom ntawm metamaterials, thiab ua qauv thiab kwv yees tus cwj pwm ntawm cov ntaub ntawv no, cov kws tshawb fawb siv cov txheej txheem simulation qib siab xws li finite element tsom xam (FEA) thiab kev suav electromagnetics. Piv txwv li, ib qho tseem ceeb ntawm kev tsim cov khoom siv metamaterial yog qhov ua tiav ntawm qhov tsis zoo refractive indices, uas tso cai rau lub teeb ua haujlwm nyob rau hauv qhov kev taw qhia ntawm cov khoom siv sib txawv, ua rau cov khoom siv kho qhov muag tshiab xws li superlensing thiab invisibility. Kev paub txog qhov tsis zoo refractive index yuav tsum muaj kev tsim vaj tsev ntawm cov qauv metamaterial, feem ntau koom nrog cov cell nrog cov duab tshwj xeeb thiab kev taw qhia.
Fabrication cov txheej txheem
Kev ua tiav kev txhais lus ntawm metamaterial tsim los ntawm cov tswv yim theoretical rau cov qauv siv tau yog nyob ntawm cov txheej txheem kev tsim khoom siab heev. Cov kws tshawb fawb tau tsim ntau txoj hauv kev rau fabricating metamaterials, txhua tus nrog nws cov txheej txheem ntawm qhov zoo thiab kev txwv. Piv txwv li, photolithography tau raug hloov mus rau cov txheej txheem metamaterials fabrication, uas muaj kev siv lub teeb hloov cov qauv ntawm lub npog ntsej muag mus rau cov tshuaj photosensitive photoresist ntawm lub substrate los tsim cov qauv complex ntawm subwavelength qauv nrog high precision.
Ib yam li ntawd, electron beam lithography muaj kev daws teeb meem ntau dua li photolithography los ntawm kev tsom ib lub teeb hluav taws xob los xaiv cov khoom tiv thaiv los tsim cov txheej txheem nyuaj thiab cov ncauj lus kom ntxaws, tso cai rau cov yam ntxwv zoo heev los tsim. Txawm li cas los xij, qhov no yog txheej txheem qeeb dua lithography thiab feem ntau yog siv rau kev tsim khoom me me. Lwm cov txheej txheem tshiab, tus nqi qis dua rau kev tsim cov khoom loj loj yog nanoimprint lithography, uas koom nrog nias lub pwm nrog cov qauv xav tau rau hauv cov khoom siv polymer, uas tom qab ntawd kho kom tsim cov qauv kawg.
Metamaterials nyob rau hauv lub teeb manipulation
Lub peev xwm los tswj thiab tswj lub teeb ntawm nanoscale qhib txoj hauv kev rau ntau daim ntawv thov ntawm metamaterials hauv ntau yam. Piv txwv li, metamaterials muaj peev xwm ua rau cov khoom tsis pom los ntawm kev khoov lub teeb nyob ib puag ncig lawv. Lub tswv yim no, hu ua optical invisibility, tau nyiam cov kws tshawb fawb thiab muaj kev siv hauv tub rog, kev soj ntsuam thiab txawm tias kev kho mob.
Metamaterials nrog qhov tsis zoo refractive indices tuaj yeem tsim cov superlenses uas dhau mus dhau qhov kev txwv tsis pub dhau ntawm cov pa optics, tso cai rau cov duab pom zoo dua li cov lo ntsiab muag pom, uas yog qhov tseem ceeb rau kev nce qib hauv microscopy thiab kev kho mob duab. Ib yam li ntawd, metamaterials tuaj yeem tsim los ua kom pom tseeb thiab ncaj qha lub teeb nrog kev ua haujlwm siab, uas muaj cov ntawv thov hauv beam shaping, telecommunications thiab advanced optical Cheebtsam.
Cov khoom siv kho qhov muag tshwj xeeb ntawm cov khoom siv metamaterials kuj ua rau lawv cov neeg sib tw zoo tshaj plaws rau kev paub txog kev paub thiab kev tshawb nrhiav thev naus laus zis. Sensors raws li metamaterials tuaj yeem ntes thiab paub txog qhov tsis tshua muaj siab ntawm cov tshuaj, ua rau lawv muaj txiaj ntsig hauv kev saib xyuas ib puag ncig thiab kev noj qab haus huv.
Kev Tshawb Fawb Tsis ntev los no ua ntej
Hauv kev tshawb fawb tsis ntev los no, cov kws tshawb fawb tau tshawb nrhiav kev nce qib hauv cov khoom siv kho qhov muag, nrog rau kev tsom mus rau hyperbolic metamaterials (hmm) rau kev siv lub teeb. Hyperbolic metamaterials nthuav tawm siab heev anisotropy thiab hyperbolic dispersion kev sib raug zoo, tso cai rau lawv los txhawb high-k hom thiab tso saib cov khoom tshwj xeeb. Cov kev txhim kho tsis ntev los no suav nrog kev kawm txog ob-dimensional hyperbolic hypersurfaces (hmm) kom kov yeej cov kev txwv tsis pub tshaj tawm ntawm cov hms ntau. Cov hms no yog tsim los ntawm cov khoom siv ntuj tsim 2D hyperbolic lossis cov qauv tsim thiab xav tias yuav yog cov khoom siv kho qhov muag nrog kev txo qis.
Lawv tsom mus rau kev nce qib hauv cov ntawv thov xws li kev daws teeb meem kho qhov muag pom, tsis zoo refraction thiab emission tswj. Ntau qhov kev sib tw hmm - xws li propagation poob - tab tom ua haujlwm los ntawm txoj hauv kev tshiab, ua kom pom kev txuas ntxiv mus siv lub peev xwm ntawm hyperbolic metamaterials hauv ntau hom kev siv kho qhov muag.
Metamaterials hauv optical xam
Hauv lwm txoj kev tshawb fawb xyoo 2022, cov kws tshawb fawb tau ua tiav qhov tseem ceeb hauv kev tsim kho qhov muag pom txhua lub platform uas siv cov khoom siv metamaterials los tswj lub teeb. Txoj kev tshawb no tshawb txog kev siv cov khoom siv los siv cov khoom siv kho qhov muag los siv cov khoom siv kho qhov muag xws li kev sib txawv thiab kev sib koom ua ke, ua rau txoj hauv kev rau kev ua tiav ntawm tag nrho cov khoom siv kho qhov muag neural networks.
Statically structured metamaterials (piv txwv li, monolayers thiab multilayers), uas tau tshawb nrhiav rau tag nrho-optical xam, qhia cov txiaj ntsig tau zoo hauv kev ua duab thiab cov ntaub ntawv ua. Tsis tas li ntawd, txoj kev tshawb no delves rau hauv kev nce qib tsis ntev los no hauv hypersurfaces thiab lwm yam khoom siv photonic, qhia txog lawv cov kev siv tau zoo hauv on-chip solid-state LIDAR, bio-imaging, thiab cov ntaub ntawv loj ua ntej. Txawm hais tias muaj kev sib tw, qhov kev tshawb fawb no ua rau muaj kev nce qib tseem ceeb hauv kev txhim kho tag nrho cov khoom siv kho qhov muag siv cov khoom siv metamaterials, nrog rau kev tsom mus rau kev ua tiav tag nrho cov photonic "lub hlwb".
Cov kev sib tw thiab cov lus qhia yav tom ntej
Txawm hais tias muaj kev vam meej tseem ceeb hauv thaj teb ntawm metamaterials, ntau qhov kev sib tw tseem nyob; Piv txwv li, kev koom ua ke metamaterials rau hauv cov khoom siv tiag tiag thiab cov tshuab yuav tsum tau hais txog cov teeb meem kev sib raug zoo nrog cov thev naus laus zis uas twb muaj lawm. Cov lus qhia yav tom ntej rau kev tshawb fawb metamaterials suav nrog kev tshawb nrhiav cov metamaterials nquag thiab dynamic uas tuaj yeem kho lawv cov khoom kho qhov muag hauv lub sijhawm tiag tiag, ua rau kev txhim kho cov khoom siv kho dua tshiab nrog kev sib txuas lus tshiab, duab thiab teeb tsa cov ntawv thov.