Chowongolera chamagetsi cha terahertz chanzeru chogwira ntchito chapangidwa bwino

Chaka chatha, gulu la Sheng Zhigao, wofufuza ku High Magnetic Field Center ya Hefei Institute of Physical Sciences, Chinese Academy of Sciences, adapanga modulator yogwira ntchito komanso yanzeru ya terahertz electro-optic modulator yodalira chipangizo choyesera cha steady-state high magnetic field. Kafukufukuyu wafalitsidwa mu ACS Applied Materials & Interfaces.

Ngakhale ukadaulo wa terahertz uli ndi mawonekedwe apamwamba kwambiri komanso kuthekera kogwiritsa ntchito bwino zinthu zambiri, kugwiritsa ntchito kwake kwaukadaulo kumachepa kwambiri chifukwa cha chitukuko cha zipangizo za terahertz ndi zigawo za terahertz. Pakati pawo, kuwongolera kwachangu komanso kwanzeru kwa mafunde a terahertz ndi gawo lakunja ndi njira yofunika kwambiri yofufuzira m'munda uno.

Pofuna kuyang'ana njira yofufuzira yapamwamba ya zigawo zapakati pa terahertz, gulu lofufuza lapanga modulator yolimbikitsa kupsinjika kwa terahertz kutengera graphene ya zinthu ziwiri [Adv. Optical Mater. 6, 1700877(2018)], modulator yoyendetsedwa ndi zithunzi ya Terahertz broadband yochokera ku oxide yogwirizana kwambiri [ACS Appl. Mater. Inter. 12, Pambuyo pa 48811(2020)] ndi gwero latsopano la terahertz lolamulidwa ndi maginito lokhazikika la phonon [Advanced Science 9, 2103229(2021)], filimu yogwirizana ya electron oxide vanadium dioxide imasankhidwa ngati kapangidwe ka functional layer, multi-layer structure ndi njira yowongolera zamagetsi zimagwiritsidwa ntchito. Kusinthasintha kwa ntchito zambiri kwa kutumiza kwa terahertz, kuwunikira ndi kuyamwa kumachitika (Chithunzi a). Zotsatira zake zikusonyeza kuti kuwonjezera pa kutumiza ndi kuyamwa, gawo la kuwunikira ndi kuwunikira lingathenso kulamulidwa ndi gawo lamagetsi, momwe kuya kwa kuwunikira kumatha kufika 99.9% ndipo gawo la kuwunikira kumatha kufika ~180o modulation (Chithunzi b). Chosangalatsa kwambiri, kuti akwaniritse kulamulira kwamagetsi kwanzeru kwa terahertz, ofufuza adapanga chipangizo chokhala ndi "terahertz - electric-terahertz" feedback loop yatsopano (Chithunzi c). Mosasamala kanthu za kusintha kwa mikhalidwe yoyambira ndi malo akunja, chipangizo chanzeru chimatha kufikira chokha mtengo wa terahertz modulation womwe ukuyembekezeka (womwe ukuyembekezeka) m'masekondi pafupifupi 30.

(a) Chithunzi cha ndondomeko yamodulator yamagetsi yamagetsikutengera VO2

(b) kusintha kwa transmittance, reflectivity, absorptivity ndi reflection gawo ndi chidwi current

(c) chithunzi cha dongosolo la ulamuliro wanzeru

Kukula kwa terahertz yogwira ntchito komanso yanzerumodulator yamagetsiKutengera zida zamagetsi zogwirizana nazo kumapereka lingaliro latsopano pakukwaniritsa ulamuliro wanzeru wa terahertz. Ntchitoyi idathandizidwa ndi National Key Research and Development Program, National Natural Science Foundation ndi High Magnetic Field Laboratory Direction Fund ya Anhui Province.