Tshiab ultra-wideband 997GHzelectro-optic modulator
Ib lub ultra-wideband electro-optic modulator tshiab tau teeb tsa cov ntaub ntawv bandwidth ntawm 997GHz
Tsis ntev los no, ib pab neeg tshawb fawb hauv Zurich, Switzerland, tau ua tiav tsim ib lub ultra-wideband electro-optic modulator uas ua haujlwm ntawm cov zaus txij li 10 MHz txog 1.14 THz, teeb tsa cov ntaub ntawv bandwidth 3 dB ntawm 997 GHz, uas yog ob npaug ntawm cov ntaub ntawv tam sim no. Qhov kev tawg tshiab no yog vim muaj kev tsim qauv zoo tshaj plaws ntawm 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 vam khom microwaves thiab millimeter waves, tab sis cov peev txheej spectrum ntawm cov zaus bands no tau zoo li saturated. Txawm hais tias kev sib txuas lus optical muaj bandwidth loj, nws tsis tuaj yeem siv ncaj qha rau kev sib kis wireless hauv qhov chaw dawb. Yog li ntawd, kev sib txuas lus THz raug suav hais tias yog "choj kub" txuas wireless thiab fiber-optic networks, muab kev daws teeb meem zoo tshaj plaws rau 6G thiab cov kab ke sib txuas lus siab dua. Qhov teeb meem nyob rau hauv qhov kev ua tau zoo ntawm cov electro-optic modulators uas twb muaj lawm (xws liLiNbO₃ modulator, InGaAs, thiab cov ntaub ntawv silicon) nyob rau hauv THz zaus band tsis txaus. Lub teeb liab attenuation yog qhov pom tseeb. Lub bandwidth ua haujlwm tsuas yog li 14 GHz thiab lub zaus nqa khoom siab tshaj plaws tsuas yog 100 GHz, uas tsis tau raws li cov qauv xav tau rau kev sib txuas lus THz. Hauv tsab xov xwm no, cov kws tshawb fawb tau tsim lub plasma-based modulator tshiab, ua tiav nce 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 thev naus laus zis ib txwm muaj tab sis kuj nthuav dav txoj hauv kev rau kev txhim kho yav tom ntej ntawm kev sib txuas lus THz!
Daim Duab 1 Plasma electro-optic modulator nrog THz bandwidth
Lub hauv paus tseem ceeb ntawm hom modulator tshiab no yog nyob rau hauv cov thev naus laus zis siab hu ua "plasma effect". Xav txog tias thaum lub teeb ci ntsa iab rau ntawm qhov chaw ntawm cov hlau nanostructure, nws resonates nrog cov electrons hauv cov khoom siv - cov electrons oscillate ua ke tsav los ntawm lub teeb, tsim ib hom nthwv dej tshwj xeeb. Nws yog qhov kev hloov pauv no uas ua rau lubtus neeg hloov kholos tswj cov teeb liab kho qhov muag nrog kev ua haujlwm siab heev. Cov txiaj ntsig ntawm kev sim qhia tau hais tias lub modulator qhia txog cov yam ntxwv zoo ntawm kev hloov kho hauv qhov ntau ntawm DC (tam sim no ncaj qha) mus rau 1.14 THz thiab muaj qhov nce ruaj khov hauv qhov zaus ntawm 500 GHz txog 800 GHz.
Yuav kom kawm txog lub tshuab ua haujlwm ntawm lub modulator, pab pawg tshawb fawb tau tsim ib qho qauv sib npaug ntawm lub voj voog thiab tshuaj xyuas qhov cuam tshuam ntawm cov qauv sib txawv ntawm kev ua haujlwm ntawm lub modulator los ntawm kev sim. Cov txiaj ntsig ntawm kev sim tau pom zoo zoo nrog tus qauv theoretical, ntxiv qhov kev txheeb xyuas qhov ua tau zoo thiab kev ruaj khov ntawm lub modulator. Tsis tas li ntawd, cov kws tshawb fawb tau tawm tswv yim txog kev npaj txhim kho. Nws xav tias los ntawm kev tsim qauv zoo tshaj plaws, qhov zaus ua haujlwm ntawm lub modulator no tuaj yeem tshaj 1THz yav tom ntej, thiab txawm tias ncav cuag ntau dua 2THz!
Txoj kev tshawb fawb no qhia txog lub peev xwm zoo ntawm plasmacov khoom siv hluav taws xob-optic modulatorshauv kev sib txuas lus THz thiab photonic integrated circuits (PICs). Lub 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 modulation. Yav tom ntej, nrog rau kev ua kom zoo dua ntawm kev tsim khoom siv thiab cov txheej txheem tsim khoom, qhov zaus ua haujlwm ntawm plasma modulators yuav tshaj 2 THz, ua tiav cov ntaub ntawv siab dua thiab kev npog spectrum dav dua. Kev tshwm sim ntawm THz era tsis yog tsuas yog txhais tau tias kev xa cov ntaub ntawv sai dua thiab muaj peev xwm paub tseeb dua, tab sis kuj tseem yuav txhawb kev sib koom ua ke ntawm ntau qhov chaw xws li kev sib txuas lus wireless, kev suav optical, thiab kev tshawb pom ntse. Kev tawg ntawm plasma electro-optic modulators yuav dhau los ua ib kauj ruam tseem ceeb ua rau kev txhim kho ntawm THz thev naus laus zis, muab lub hauv paus rau kev sib txuas lus ceev ceev ntawm lub zej zog cov ntaub ntawv yav tom ntej.
Lub sijhawm tshaj tawm: Lub Rau Hli-09-2025