Tshiab ultra-wideband 997GHzelectro-optic modulator
Tus tshiab ultra-wideband electro-optic modulator tau teeb tsa cov ntaub ntawv bandwidth ntawm 997GHz
Tsis ntev los no, ib pab neeg tshawb fawb hauv Zurich, Switzerland, tau ua tiav ib qho ultra-wideband electro-optic modulator uas ua haujlwm ntawm zaus ntawm 10 MHz mus rau 1.14 THz, teeb tsa 3 dB bandwidth cov ntaub ntawv ntawm 997 GHz, uas yog ob npaug ntawm cov ntaub ntawv tam sim no. Qhov kev ua tiav no yog vim qhov kev tsim kho kom zoo ntawm cov ntshav plasma modulators, qhib qhov chaw tshiab rau yav tom ntej terahertz photonic integrated circuits (PICs).
Tam sim no, kev sib txuas lus wireless feem ntau yog nyob ntawm microwaves thiab millimeter nthwv dej, tab sis cov peev txheej spectrum ntawm cov zaus bands tau zoo li saturated. Txawm hais tias kev sib txuas lus kho qhov muag muaj qhov bandwidth loj, nws tsis tuaj yeem siv ncaj qha rau kev xa xov wireless hauv qhov chaw dawb. Yog li ntawd, THz kev sib txuas lus yog suav hais tias yog "kub choj" txuas wireless thiab fiber-optic tes hauj lwm, muab cov kev daws teeb meem zoo tshaj plaws rau 6G thiab kev sib txuas lus siab dua. Qhov teeb meem nyob hauv qhov kev ua tau zoo ntawm cov khoom siv hluav taws xob optic uas twb muaj lawm (xws liLiNbO₃ modulator, InGaAs, thiab cov khoom siv silicon) hauv THz zaus band yog deb ntawm qhov txaus. Lub teeb liab attenuation yog pom tseeb. Kev ua haujlwm bandwidth tsuas yog kwv yees li 14 GHz thiab qhov siab tshaj plaws tus neeg nqa khoom zaus tsuas yog 100 GHz, uas yog deb ntawm kev ua tau raws li cov qauv xav tau rau THz kev sib txuas lus. Hauv tsab xov xwm no, cov kws tshawb fawb tau tsim cov plasma-raws li modulator tshiab, ua tiav qhov 3 dB bandwidth mus rau 997 GHz, uas yog ob npaug ntawm cov ntaub ntawv tam sim no, raws li pom hauv daim duab 1. Qhov kev tawg no tsis yog tsuas yog rhuav tshem cov kev txwv ntawm cov cuab yeej siv niaj hnub tab sis kuj nthuav dav txoj hauv kev rau kev txhim kho yav tom ntej ntawm THz kev sib txuas lus!
Daim duab 1 Plasma electro-optic modulator nrog THz bandwidth
Qhov tseem ceeb ntawm qhov kev hloov kho tshiab no yog nyob rau hauv high-tech hu ua "plasma effect". Xav txog tias thaum lub teeb ci nyob rau saum npoo ntawm cov hlau nanostructure, nws resonates nrog cov electrons nyob rau hauv cov khoom - cov electrons oscillate collectively tsav los ntawm lub teeb, ua ib tug tshwj xeeb hom yoj. Nws yog precisely no fluctuation uas enables lubmodulatorlos tswj cov teeb liab optical nrog kev ua haujlwm siab heev. Cov txiaj ntsig kev sim qhia tau hais tias tus modulator nthuav tawm cov yam ntxwv zoo hauv qhov ntau ntawm DC (tam sim no ncaj qha) mus rau 1.14 THz thiab muaj kev ruaj khov nce hauv qhov zaus ntawm 500 GHz txog 800 GHz.
Txhawm rau kawm tob tob txog kev ua haujlwm ntawm lub modulator, pab pawg tshawb fawb tau tsim cov qauv sib npaug sib npaug thiab txheeb xyuas qhov cuam tshuam ntawm cov txheej txheem sib txawv ntawm kev ua haujlwm ntawm lub modulator los ntawm kev simulation. Cov txiaj ntsig kev sim tau pom zoo nrog tus qauv theoretical, ntxiv kev txheeb xyuas qhov ua tau zoo thiab kev ruaj ntseg ntawm tus modulator. Tsis tas li ntawd, cov kws tshawb fawb tau tawm tswv yim txog kev txhim kho. Nws cia siab tias los ntawm kev tsim kho kom zoo, kev ua haujlwm zaus ntawm qhov kev hloov pauv no tuaj yeem tshaj 1THz yav tom ntej, thiab txawm tias ncav cuag tshaj 2THz!
Txoj kev tshawb no qhia tau hais tias muaj peev xwm loj ntawm plasmaelectro-optic modulatorshauv THz kev sib txuas lus thiab photonic integrated circuits (PICs). Cov cuab yeej no, nrog nws cov yam ntxwv ntawm ultra-wideband, kev ua haujlwm siab thiab kev sib koom ua ke, muab cov kev daws teeb meem tshiab rau THz teeb liab hloov kho. Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho ntxiv ntawm cov cuab yeej tsim thiab tsim cov txheej txheem, kev khiav hauj lwm zaus ntawm plasma modulators yuav tsum siab tshaj 2 THz, ua tiav cov ntaub ntawv ntau dua thiab dav spectrum kev pab them nqi. Kev tshwm sim ntawm THz era tsis tsuas yog txhais tau tias kev xa cov ntaub ntawv sai dua thiab muaj peev xwm paub qhov tseeb dua, tab sis kuj tseem yuav txhawb kev sib sib zog nqus ntawm ntau qhov chaw xws li kev sib txuas lus wireless, kev siv kho qhov muag, thiab kev tshawb nrhiav ntse. Kev tawg ntawm plasma electro-optic modulators yuav dhau los ua cov kauj ruam tseem ceeb ua rau kev txhim kho THz thev naus laus zis, muab lub hauv paus rau kev sib txuas ceev ceev ntawm lub neej yav tom ntej cov ntaub ntawv xov xwm.
Post lub sij hawm: Jun-09-2025