Modulator yatsopano ya electro-optic ya 997GHz yopingasa kwambiri

Bandeji yatsopano ya ultra-wideband 997GHzmodulator yamagetsi

Chosinthira chatsopano cha electro-optic cha ultra-wideband chakhazikitsa mbiri ya bandwidth ya 997GHz

Posachedwapa, gulu lofufuza ku Zurich, Switzerland, lapanga bwino chipangizo chowongolera ma electro-optic cha ultra-wideband chomwe chimagwira ntchito pa ma frequency kuyambira 10 MHz mpaka 1.14 THz, ndikuyika rekodi ya bandwidth ya 3 dB pa 997 GHz, yomwe ndi mbiri yowirikiza kawiri kuposa yomwe ilipo pano. Kupambana kumeneku kumachitika chifukwa cha kapangidwe kabwino ka ma plasma modulators, ndikutsegula malo atsopano amtsogolo a terahertz photonic integrated circuits (PICs).

Pakadali pano, kulumikizana opanda zingwe kumadalira kwambiri ma microwave ndi ma millimeter wave, koma zinthu zomwe zili m'ma frequency band awa zimakhala zodzaza. Ngakhale kulumikizana kwa kuwala kuli ndi bandwidth yayikulu, sikungagwiritsidwe ntchito mwachindunji potumiza opanda zingwe m'malo omasuka. Chifukwa chake, kulumikizana kwa THz kumaonedwa ngati "mlatho wagolide" wolumikizira ma netiweki opanda zingwe ndi fiber-optic, zomwe zimapereka yankho labwino kwambiri pamakina olumikizirana a 6G ndi apamwamba. Vuto lili m'chakuti magwiridwe antchito a ma electro-optic modulators omwe alipo (mongaLiNbO₃ modulator, InGaAs, ndi zinthu zopangidwa ndi silicon) mu gulu la ma frequency la THz sizokwanira. Kuchepa kwa chizindikiro n'kodziwikiratu. Bandwidth yogwira ntchito ndi pafupifupi 14 GHz ndipo ma frequency apamwamba kwambiri onyamula ndi 100 GHz okha, zomwe sizikukwaniritsa miyezo yofunikira pakulankhulana kwa THz. Munkhaniyi, ofufuza apanga modulator yatsopano yochokera ku plasma, ndikuwonjezera bwino bandwidth ya 3 dB kufika pa 997 GHz, yomwe ndi mbiri yowirikiza kawiri pakali pano, monga momwe zasonyezedwera pa Chithunzi 1. Kupambana kumeneku sikungophwanya zoletsa zaukadaulo wachikhalidwe komanso kumakulitsa njira yopititsira patsogolo kulumikizana kwa THz mtsogolo!

Chithunzi 1: Plasma electro-optic modulator yokhala ndi bandwidth ya THz

Kupambana kwakukulu kwa mtundu watsopano wa modulator kuli mu ukadaulo wapamwamba wotchedwa "plasma effect". Tangoganizani kuti kuwala kukawala pamwamba pa nanostructure yachitsulo, kumalumikizana ndi ma elekitironi omwe ali mu chinthucho - ma elekitironi amasinthasintha pamodzi motsogozedwa ndi kuwala, ndikupanga mtundu wapadera wa mafunde. Ndi kusinthasintha kumeneku komwe kumathandiziramodulatorkuti isinthe ma signal a kuwala bwino kwambiri. Zotsatira za mayeso zikuwonetsa kuti modulator ikuwonetsa mawonekedwe abwino a modulation mkati mwa DC (direct current) mpaka 1.14 THz ndipo ili ndi stable gain mu frequency band ya 500 GHz mpaka 800 GHz.

Kuti aphunzire mozama momwe modulator imagwirira ntchito, gulu lofufuza linapanga chitsanzo chofanana cha dera ndikuwunika momwe magawo osiyanasiyana amagwirira ntchito pa ntchito ya modulator kudzera mu kuyerekezera. Zotsatira za kuyesa zikugwirizana bwino ndi chitsanzo cha chiphunzitso, zomwe zimatsimikiziranso kuti modulator ikugwira ntchito bwino komanso kukhazikika kwake. Kuphatikiza apo, ofufuza apereka dongosolo lowongolera. Akuyembekezeka kuti kudzera mu kapangidwe kabwino, kuchuluka kwa magwiridwe antchito a modulator iyi kumatha kupitirira 1THz mtsogolo, komanso kufika pa 2THz!

Kafukufukuyu akuwonetsa kuthekera kwakukulu kwa plasmama modulators a electro-opticMu THz communication ndi photonic integrated circuits (PICs). Chipangizochi, chokhala ndi mawonekedwe a ultra-wideband, high efficiency ndi integration, chimapereka njira yatsopano yosinthira chizindikiro cha THz. M'tsogolomu, ndi kukonza bwino kwa kapangidwe ka chipangizo ndi njira zopangira, kuchuluka kwa ma modulators a plasma kukuyembekezeka kupitirira 2 THz, kukwaniritsa kuchuluka kwa deta komanso kufalikira kwa ma spectrum ambiri. Kubwera kwa nthawi ya THz sikungotanthauza kutumiza deta mwachangu komanso luso lolondola lozindikira, komanso kudzalimbikitsa kuphatikiza kwakukulu kwa magawo angapo monga kulumikizana opanda zingwe, makompyuta owonera, ndi kuzindikira mwanzeru. Kupambana kwa ma modulators a plasma electro-optic kungakhale sitepe yofunika kwambiri yotsogolera chitukuko cha ukadaulo wa THz, kupereka maziko a kulumikizana mwachangu kwa gulu lazidziwitso lamtsogolo.