Kunyaka ophelileyo, iqela likaSheng Zhigao, umphandi kwiZiko leMagnetic Field leHefei Institute of Physical Sciences, iChinese Academy of Sciences, lenze i-terahertz electro-optic modulator esebenzayo nekrelekrele exhomekeke kwisixhobo sovavanyo se-magnetic field esizinzileyo. Olu phando lupapashwe kwi-ACS Applied Materials & Interfaces.
Nangona iteknoloji ye-terahertz ineempawu eziphezulu ze-spectral kunye namathuba amaninzi okusetyenziswa, ukusetyenziswa kwayo kobunjineli kusathintelwe kakhulu kuphuhliso lwezixhobo ze-terahertz kunye nezixhobo ze-terahertz. Phakathi kwazo, ulawulo olusebenzayo nolukrelekrele lwamaza e-terahertz yintsimi yangaphandle lulwalathiso olubalulekileyo lophando kweli candelo.
Lijolise kwicala lophando oluphambili lwezinto eziphambili ze-terahertz, iqela lophando liyile i-terahertz stress modulator esekelwe kwi-graphene yezinto ezinemilinganiselo emibini [Adv. Optical Mater. 6, 1700877(2018)], i-Terahertz broadband photocontrolled modulator esekelwe kwi-oxide enxulumene kakhulu [ACS Appl. Mater. Inter. 12, Emva kwe-48811(2020)] kunye nomthombo omtsha we-terahertz one-frequency magnetic-controlled magnetic one-single-frequency [Advanced Science 9, 2103229(2021)], ifilimu ye-electron oxide vanadium dioxide edibeneyo ikhethwa njengomaleko osebenzayo, uyilo lwesakhiwo esineengqimba ezininzi kunye nendlela yolawulo lwe-elektroniki iyasetyenziswa. Ukuguqulwa okusebenzayo kwe-terahertz transmission, reflection kunye ne-absorption kuyafezekiswa (Umfanekiso a). Iziphumo zibonisa ukuba ukongeza kwi-transmittance kunye ne-absorptivity, i-reflectivity kunye ne-reflectivity phase inokulawulwa ngokukhutheleyo yintsimi yombane, apho ubunzulu be-reflectivity modulation bunokufikelela kwi-99.9% kwaye i-reflectivity phase inokufikelela kwi-~180o modulation (Umfanekiso b). Okubangela umdla ngakumbi, ukuze kufezekiswe ulawulo lombane olukrelekrele lwe-terahertz, abaphandi bayila isixhobo esine-feedback loop entsha ethi "terahertz - electric-terahertz" (Umfanekiso c). Nokuba kukho utshintsho kwiimeko zokuqala kunye nokusingqongileyo kwangaphandle, isixhobo esikrelekrele sinokufikelela ngokuzenzekelayo kwixabiso le-terahertz modulation elisetiweyo (elilindelweyo) kwimizuzwana engama-30.
(a) Umzobo wesicwangciso se-i-electro optic modulatorisekelwe kwi-VO2
(b) utshintsho lokudluliselwa, ukubonakalisa, ukufunxa kunye nesigaba sokubonakalisa ngomsinga ochukumisayo
(c) umzobo wesicwangciso solawulo olukrelekrele
Uphuhliso lwe-terahertz esebenzayo nekrelekrelei-electro-optic modulatorngokusekelwe kwizixhobo ze-elektroniki ezinxulumeneyo kubonelela ngengcamango entsha yokufezekisa ulawulo olukrelekrele lwe-terahertz. Lo msebenzi uxhaswe yiNkqubo yoPhando noPhuhliso oluPhambili lweSizwe, iNational Natural Science Foundation kunye neHigh Magnetic Field Laboratory Direction Fund yePhondo lase-Anhui.
Ixesha lokuthumela: Agasti-08-2023