Terahertz eletrọ-optic modulator nwere ọgụgụ isi na-arụ ọrụ emebela nke ọma

N'afọ gara aga, otu Sheng Zhigao, onye nyocha na High Magnetic Field Center nke Hefei Institute of Physical Sciences, Chinese Academy of Sciences, mepụtara ihe na-arụsi ọrụ ike ma nwee ọgụgụ isi terahertz electro-optic modulator na-adabere na nnwale ebe ndọta dị elu nke kwụsiri ike. ngwaọrụ. A na-ebipụta nyocha a na ACS Applied Materials & Interfaces.

Ọ bụ ezie na teknụzụ terahertz nwere njiri mara ọkwa dị elu yana atụmanya ngwa sara mbara, ngwa injinịa ya ka na-ejedebe nke ukwuu site na mmepe nke ihe terahertz na akụrụngwa terahertz. N'ime ha, njikwa ọrụ na ọgụgụ isi nke terahertz wave site na mpaghara mpụga bụ ntụziaka nyocha dị mkpa na mpaghara a.

N'ịchọ na ntuzi aka nyocha nke terahertz isi akụrụngwa, ndị otu nyocha ahụ ewepụtala ihe nrụpụta nrụgide terahertz dabere na graphene ihe nwere akụkụ abụọ [Adv. Ngwa anya. 6, 1700877(2018)], Terahertz brọdband photocontrolled modulator dabere na oxide nwere njikọ siri ike [ACS Appl. Mater. Inter. 12, Mgbe 48811 (2020)] na phonon dabeere na otu ugboro magnetik na-achịkwa terahertz isi iyi [Advanced Science 9, 2103229(2021)], a na-ahọrọ ihe nkiri elektrọn oxide vanadium dioxide jikọtara dị ka oyi akwa na-arụ ọrụ, nhazi multilayer. A na-anabata usoro nhazi na njikwa eletrọnịkị. Multifunctional arụ ọrụ modulation nke terahertz nnyefe, echiche na absorption na-enweta (ọgụgụ a). Nsonaazụ na-egosi na na mgbakwunye na nnyefe na absorptivity, a na-ejikwa ọkụ eletrik na-arụsi ọrụ ike na-achịkwa usoro ntụgharị uche na ntụgharị uche, nke ihe omimi nke ntụgharị uche nwere ike iru 99.9% na usoro ntụgharị uche nwere ike iru ~ 180o modulation (Nyocha b) . Ihe na-adọrọ mmasị karị, iji nweta njikwa ọkụ eletrik terahertz nwere ọgụgụ isi, ndị nchọpụta ahụ mere otu ngwaọrụ nwere akwụkwọ nzaghachi "terahertz - electric-terahertz" nzaghachi nzaghachi (Figure c). N'agbanyeghị mgbanwe na ọnọdụ mmalite na mpụga gburugburu, smart ngwaọrụ nwere ike na-akpaghị aka iru set (atụ anya) terahertz uru modulation n'ihe dị ka 30 sekọnd.

(a) Eserese eserese nke iheelectro optic modulatordabere na VO2

(b) mgbanwe nke transmittance, reflectivity, absorptivity na ntụgharị uche na-adọ na mmasị ugbu a

(c) eserese schematic nke njikwa ọgụgụ isi

Mmepe nke terahertz na-arụsi ọrụ ike na ọgụgụ isielectrooptic modulatordabere na ihe eletrọnịkị jikọtara ya na-enye echiche ọhụrụ maka mmezu nke njikwa ọgụgụ isi nke terahertz. Ọrụ a bụ National Key Research and Development Programme, National Natural Science Foundation na High Magnetic Field Laboratory Direction Fund nke Anhui Province kwadoro ọrụ a.