Physicists los ntawm Moscow lub koom haum ntawm Physics thiab Technology nrog cov npoj yaig los ntawm Moscow State Pedagogical University thiab University of Manchester tau tsim ib tug heev rhiab heev terahertz hluav taws xob ntes raws li tunneling nyhuv nyob rau hauv graphene. Qhov tseeb, ib qho kev cuam tshuam ntawm qhov av transistor tau hloov mus rau hauv lub ntsuas, uas tuaj yeem qhib los ntawm cov cim "los ntawm huab cua", thiab tsis kis los ntawm cov pa hluav taws xob.
Quantum tunneling. Duab qhov chaw: Daria Sokol, MIPT xovxwm kev pabcuam
Qhov kev tshawb pom, uas yog los ntawm cov tswv yim ntawm physicists Mikhail Dyakonov thiab Mikhail Shur tau npaj siab thaum xyoo 1990, coj los ze zog rau lub sijhawm ntawm wireless terahertz technologies. Qhov no txhais tau hais tias qhov ceev ntawm kev sib txuas lus wireless yuav nce ntau zaus, thiab radar thiab kev ruaj ntseg technologies, xov tooj cua astronomy thiab kev kuaj mob kho mob yuav nce mus rau tag nrho cov tshiab.
Lub tswv yim ntawm Lavxias teb sab physicists yog hais tias lub tunnel transistor tau thov kom siv tsis yog rau lub teeb liab amplification thiab demodulation, tab sis raws li ib tug ntaus ntawv uas "los ntawm nws tus kheej hloov lub modulated teeb liab mus rau hauv ib tug sequence ntawm cov khoom los yog lub suab ntaub ntawv vim hais tias ntawm lub nonlinear kev sib raug zoo. nruab nrab ntawm tam sim no thiab voltage. " Hauv lwm lo lus, cov nyhuv tunneling tuaj yeem tshwm sim ntawm theem teeb liab tsis tshua muaj siab ntawm lub transistor lub rooj vag, uas yuav tso cai rau lub transistor pib lub tunneling tam sim no (qhib) txawm los ntawm lub teeb liab tsis muaj zog heev.
Vim li cas cov tswv yim classic ntawm kev siv transistors tsis haum? Thaum tsiv mus rau terahertz ntau yam, feem ntau cov transistors uas twb muaj lawm tsis muaj sij hawm kom tau txais cov nqi them, yog li cov xov tooj cua classic nrog lub teeb liab tsis muaj zog ntawm lub transistor tom qab demodulation yuav tsis muaj txiaj ntsig. Nws yog ib qho tsim nyog los txhim kho cov transistors, uas kuj ua hauj lwm mus txog ib qho kev txwv, los yog muab ib yam dab tsi txawv kiag li. Lavxias teb sab physicists thov kom meej qhov no "lwm yam."
Graphene tunnel transistor ua terahertz detector. Duab qhov chaw: Nature Communications
"Lub tswv yim ntawm cov lus teb muaj zog ntawm lub qhov transistor rau qhov tsis tshua muaj hluav taws xob tau paub txog li kaum tsib xyoos," hais tias ib tus kws sau ntawv ntawm txoj kev tshawb no, tus thawj coj ntawm lub chaw soj nstuam ntawm optoelectronics ntawm ob-dimensional cov ntaub ntawv ntawm Center for Photonics thiab Ob-Dimensional Materials ntawm MIPT, Dmitry Svintsov. "Ua ntej peb, tsis muaj leej twg paub tias tib yam khoom ntawm lub qhov taub transistor tuaj yeem siv rau hauv terahertz detector technology." Raws li cov kws tshawb fawb tau tsim, "yog tias lub transistor qhib thiab kaw zoo ntawm lub zog qis ntawm cov teeb liab tswj, ces nws kuj yuav tsum zoo rau khaws cov teeb liab tsis muaj zog los ntawm huab cua."
Rau qhov kev sim, tau piav qhia hauv phau ntawv Journal Nature Communications, lub qhov transistor tau tsim los ntawm bilayer graphene. Qhov kev sim tau pom tias qhov rhiab heev ntawm cov cuab yeej hauv hom qhov av yog ntau qhov kev txiav txim siab ntau dua li hauv hom kev thauj mus los. Yog li, qhov kev sim transistor ntes tau ua rau tsis muaj qhov tsis zoo dua li cov superconductor thiab semiconductor bolometers muaj nyob hauv khw. Txoj kev xav qhia tias qhov purer lub graphene, qhov siab dua yuav, uas deb tshaj lub peev xwm ntawm niaj hnub terahertz detectors, thiab qhov no tsis yog ib qho kev hloov pauv, tab sis kev hloov pauv hauv kev lag luam.
Tau qhov twg los: 3d xov.ru