Ngonyaka odlule, ithimba likaSheng Zhigao, umcwaningi e-High Magnetic Field Center ye-Hefei Institute of Physical Sciences, i-Chinese Academy of Sciences, lakha i-modulator ye-terahertz electro-optic esebenzayo nehlakaniphile ethembele kudivayisi yokuhlola ye-steady-state high magnetic field. Ucwaningo lushicilelwe ku-ACS Applied Materials & Interfaces.
Nakuba ubuchwepheshe be-terahertz bunezici ze-spectral eziphakeme kanye namathuba amaningi okusetshenziswa, ukusetshenziswa kwayo kobunjiniyela kusavinjelwe kakhulu ukuthuthukiswa kwezinto ze-terahertz kanye nezingxenye ze-terahertz. Phakathi kwazo, ukulawulwa okusebenzayo nokuhlakaniphile kwegagasi le-terahertz yinsimu yangaphandle kuyisiqondiso esibalulekile socwaningo kulo mkhakha.
Ihlose ukuqondiswa kocwaningo olusezingeni eliphezulu lwezingxenye eziyinhloko ze-terahertz, ithimba locwaningo lisungule i-modulator yokucindezeleka ye-terahertz esekelwe ku-graphene yezinto ezibonakalayo ezimbili [Adv. Optical Mater. 6, 1700877(2018)], i-modulator ye-Terahertz broadband photocontrolled esekelwe ku-oxide ehlobene kakhulu [ACS Appl. Mater. Inter. 12, Ngemuva kuka-48811(2020)] kanye nomthombo omusha we-terahertz olawulwa yi-magnetic single-frequency [Advanced Science 9, 2103229(2021)], ifilimu ye-electron oxide vanadium dioxide ehlobene ikhethwa njengesendlalelo esisebenzayo, ukwakheka kwesakhiwo esinezingqimba eziningi kanye nendlela yokulawula ye-elekthronikhi kuyasetshenziswa. Ukuguqulwa okusebenzayo kwemisebenzi eminingi kokudluliselwa kwe-terahertz, ukuzindla kanye nokumuncwa kuyatholakala (Umfanekiso a). Imiphumela ikhombisa ukuthi ngaphezu kokudluliselwa kanye nokumuncwa, isigaba sokubonakalisa kanye nokuzindla singalawulwa ngenkuthalo yinsimu kagesi, lapho ukujula kokuguquguquka kokubonakalisa kungafinyelela ku-99.9% kanti isigaba sokubonakalisa singafinyelela ku-~180o modulation (Isithombe b). Okuthakazelisa kakhulu, ukuze kufezwe ukulawulwa kukagesi kwe-terahertz okuhlakaniphile, abacwaningi baklame idivayisi ene-feedback loop entsha ethi “terahertz – electric-terahertz” (Isithombe c). Kungakhathaliseki ukuthi yiziphi izinguquko ezimweni zokuqala kanye nendawo yangaphandle, idivayisi ehlakaniphile ingafinyelela ngokuzenzakalelayo inani lokuguquguquka kwe-terahertz elibekiwe (elilindelwe) ngemizuzwana engaba ngu-30.
(a) Umdwebo wesimiso we-i-electro optic modulatorngokusekelwe ku-VO2
(b) izinguquko zokudlulisa, ukubonakalisa, ukumuncwa kanye nesigaba sokubonakalisa ngogesi ohlatshwe umxhwele
(c) umdwebo wesimiso wokulawula okuhlakaniphile
Ukuthuthukiswa kwe-terahertz esebenzayo nehlakaniphilei-electro-optic modulatorngokusekelwe ezintweni ezihambisanayo ze-elekthronikhi kunikeza umbono omusha wokufezwa kokulawulwa okuhlakaniphile kwe-terahertz. Lo msebenzi usekelwe yiNational Key Research and Development Program, iNational Natural Science Foundation kanye neHigh Magnetic Field Laboratory Direction Fund yeSifundazwe sase-Anhui.
Isikhathi sokuthunyelwe: Agasti-08-2023