Akatswiri a sayansi ya zakuthambo ochokera ku Moscow Institute of Physics and Technology ndi anzawo aku Moscow State Pedagogical University ndi University of Manchester apanga chowunikira kwambiri cha terahertz potengera momwe graphene imagwirira ntchito. M'malo mwake, transistor yogwira ntchito m'munda idasinthidwa kukhala chowunikira, chomwe chimatha kutsegulidwa ndi ma sign "kuchokera mlengalenga", osati kufalikira kudzera mumayendedwe wamba.
Quantum tunneling. Gwero la zithunzi: Daria Sokol, MIPT press service
Kupeza, komwe kunachokera ku malingaliro a akatswiri a sayansi ya zakuthambo Mikhail Dyakonov ndi Mikhail Shur omwe adafunsidwa kumayambiriro kwa zaka za m'ma 1990, akuyandikira nthawi ya teknoloji ya terahertz yopanda zingwe. Izi zikutanthauza kuti liwiro la mauthenga opanda zingwe lidzawonjezeka nthawi zambiri, ndipo matekinoloje a radar ndi chitetezo, sayansi ya zakuthambo pawailesi ndi matenda azachipatala adzakwera pamlingo watsopano.
Lingaliro la akatswiri a sayansi ya zakuthambo aku Russia linali loti transistor ya ngalandeyo idapangidwa kuti isagwiritsidwe ntchito pokulitsa ma siginecha ndi kutsitsa, koma ngati chipangizo chomwe "chokhacho chimatembenuza chizindikirocho kukhala mndandanda wazinthu kapena zidziwitso zamawu chifukwa chaubwenzi wopanda mzere. pakati pa current ndi voltage.” Mwa kuyankhula kwina, kusintha kwa tunneling kumatha kuchitika pamlingo wotsika kwambiri pachipata cha transistor, zomwe zimalola kuti transistor ayambitse njira yolumikizira (yotseguka) ngakhale kuchokera ku siginecha yofooka kwambiri.
Chifukwa chiyani chiwembu chapamwamba chogwiritsa ntchito ma transistors sichili choyenera? Mukasamukira kumtundu wa terahertz, ma transistors ambiri omwe alipo alibe nthawi yoti alandire ndalama zomwe amafunikira, chifukwa chake ma wayilesi akale omwe ali ndi ma amplifier ofooka pama transistor otsatiridwa ndi demodulation amakhala osagwira ntchito. Ndikofunikira mwina kusintha ma transistors, omwe amagwiranso ntchito mpaka malire, kapena kupereka china chosiyana. Akatswiri a sayansi ya zakuthambo a ku Russia ananena ndendende zimenezi “zina.”
Graphene tunnel transistor ngati chowunikira cha terahertz. Gwero lachithunzi: Nature Communications
"Lingaliro la kuyankha mwamphamvu kwa tunnel transistor kumagetsi otsika ladziwika kwa zaka pafupifupi khumi ndi zisanu," akutero m'modzi mwa omwe adalemba kafukufukuyu, wamkulu wa labotale ya optoelectronics yazinthu ziwiri-dimensional ku Center for Photonics. ndi Zida ziwiri-Dimensional ku MIPT, Dmitry Svintsov. "Tisanakhalepo, palibe amene adazindikira kuti chinthu chomwechi cha transistor chitha kugwiritsidwa ntchito muukadaulo wa terahertz detector." Monga momwe asayansi anenera, "ngati transistor itsegula ndi kutseka bwino ndi mphamvu yochepa ya chizindikiro chowongolera, ndiye kuti iyeneranso kunyamula chizindikiro chofooka kuchokera mumlengalenga."
Pakuyesaku, komwe kufotokozedwa m'magazini ya Nature Communications, transistor ya ngalande idapangidwa pa bilayer graphene. Kuyeseraku kunawonetsa kuti kukhudzika kwa chipangizocho mukamalowera kumachulukidwe angapo apamwamba kuposa momwe amayendera akale. Chifukwa chake, chowunikira choyesera cha transistor sichinakhale choyipa kwambiri kuposa ma superconductor ndi semiconductor bolometer omwe amapezeka pamsika. Chiphunzitsochi chikusonyeza kuti graphene yoyera, ndipamwamba kwambiri kukhudzika kudzakhala, komwe kumaposa mphamvu za zowunikira zamakono za terahertz, ndipo izi sizosintha, koma kusintha kwa makampani.
Source: 3dnews.ru