Chaka chatha, gulu la Sheng Zhigao, wofufuza pa High Magnetic Field Center ya Hefei Institute of Physical Sciences, Chinese Academy of Sciences, adapanga makina ogwiritsira ntchito komanso anzeru a terahertz electro-optic modulator kudalira chipangizo choyesera chapamwamba kwambiri cha maginito. Kafukufukuyu adasindikizidwa mu ACS Applied Materials & Interfaces.
Ngakhale ukadaulo wa terahertz uli ndi mawonekedwe apamwamba kwambiri komanso chiyembekezo chogwiritsa ntchito kwambiri, ntchito yake yaukadaulo ikadali yocheperako popanga zida za terahertz ndi zida za terahertz. Mwa iwo, kuwongolera mwachangu komanso mwanzeru kwa mafunde a terahertz ndi gawo lakunja ndi njira yofunikira pakufufuza pankhaniyi.
Poyang'ana pa kafukufuku wotsogola wazinthu zazikuluzikulu za terahertz, Gulu lofufuza lapanga chosinthira cha terahertz chotengera ma graphene amitundu iwiri [Adv. Optical Mater. 6, 1700877(2018)], Terahertz Broadband photocontrolled modulator yotengera oxide yogwirizana kwambiri [ACS Appl. Mater. Inter. 12, Pambuyo pa 48811(2020)] ndi gwero latsopano la terahertz loyendetsedwa ndi phonon-frequency single-frequency controlled terahertz [Advanced Science 9, 2103229(2021)], filimu yogwirizana ndi electron oxide vanadium dioxide imasankhidwa ngati gawo logwira ntchito, kapangidwe kamitundu yambiri komanso njira yowongolera zamagetsi imatengedwa. Multifunctional yogwira kusinthasintha kwa terahertz kufala, kusinkhasinkha ndi kuyamwa kumatheka (Chithunzi a). Zotsatira zikuwonetsa kuti kuwonjezera pa transmittance and absorptivity, reflectivity and reflectivity gawo lingathenso kuyendetsedwa mwachangu ndi magetsi, momwe kusinkhasinkha kwakuya kungathe kufika 99.9% ndipo gawo lowonetsera likhoza kufika ~ 180o modulation (Chithunzi b). Chochititsa chidwi kwambiri, kuti akwaniritse mphamvu zamagetsi za terahertz zanzeru, ofufuzawo adapanga chipangizo chokhala ndi buku la "terahertz - electric-terahertz" feedback loop (Chithunzi c). Mosasamala kanthu za kusintha komwe kumayambira komanso malo akunja, chipangizo chanzeru chimatha kungofikira pamtengo wosinthira (woyembekezeredwa) wa terahertz pafupifupi masekondi 30.
(a) Chithunzi chojambula chaelectro optic modulekutengera VO2
(b) kusintha kwa transmittance, reflectivity, mayamwidwe ndi kusinkhasinkha gawo ndi chidwi panopa
(c) Chiwonetsero chadongosolo lanzeru
Kukula kwa terahertz yogwira komanso yanzeruelectro-optic modulatorkutengera zida zamagetsi zomwe zimagwirizana zimapereka lingaliro latsopano pakukwaniritsidwa kwa kuwongolera kwanzeru kwa terahertz. Ntchitoyi inathandizidwa ndi National Key Research and Development Programme, National Natural Science Foundation ndi High Magnetic Field Laboratory Direction Fund ya Anhui Province.
Nthawi yotumiza: Aug-08-2023