N'afọ gara aga, ndị otu Sheng Zhigao, onye nyocha na High Magnetic Field Center nke Hefei Institute of Physical Sciences, Chinese Academy of Sciences, mepụtara terahertz electro-optic modulator na-arụ ọrụ ma nwee ọgụgụ isi, na-adabere na ngwaọrụ nnwale magnetic dị elu nke na-adịgide adịgide. A na-ebipụta nnyocha ahụ na ACS Applied Materials & Interfaces.
Ọ bụ ezie na teknụzụ terahertz nwere njirimara spectral dị elu na atụmanya ngwa sara mbara, ojiji injinia ya ka nwere oke oke site na mmepe nke ihe terahertz na akụkụ terahertz. N'ime ha, njikwa ike na ọgụgụ isi nke terahertz ebili mmiri site na mpụga bụ ntụziaka nyocha dị mkpa n'ọhịa a.
N'ịchọ ụzọ nchọpụta kachasị ọhụrụ nke ihe ndị dị na terahertz, ndị otu nnyocha ahụ emepụtala ihe na-eme ka nrụgide terahertz dị elu dabere na graphene ihe dị n'akụkụ abụọ [Adv. Optical Mater. 6, 1700877(2018)], ihe na-eme ka foto na-achịkwa Terahertz broadband dabere na oxide jikọtara nke ọma [ACS Appl. Mater. Inter. 12, Mgbe 48811(2020)] na isi iyi terahertz ọhụrụ nke dabere na phonon [Advanced Science 9, 2103229(2021)], a na-ahọrọ ihe nkiri elektrọn oxide vanadium dioxide dị ka oyi akwa ọrụ, a na-anabata nhazi ọtụtụ oyi akwa na usoro njikwa elektrọnik. A na-enweta mgbanwe ọrụ dị iche iche nke nnyefe terahertz, ntụgharị uche na nnabata (Foto a). Nsonaazụ ya gosiri na na mgbakwunye na nnyefe na ịmịkọrọ ihe, enwere ike ịchịkwa usoro ntụgharị na ntụgharị ihe site na mpaghara eletriki, ebe omimi mgbanwe ntụgharị nwere ike iru 99.9% na usoro ntụgharị nwere ike iru ~180o modulation (Foto b). Ihe na-adọrọ mmasị karị bụ na iji nweta njikwa eletriki terahertz nwere ọgụgụ isi, ndị nchọpụta chepụtara ngwaọrụ nwere usoro nzaghachi "terahertz - electric-terahertz" ọhụrụ (Foto c). N'agbanyeghị mgbanwe ndị dị na ọnọdụ mmalite na gburugburu ebe obibi mpụga, ngwaọrụ smart nwere ike iru uru nhazi terahertz setịpụrụ (a tụrụ anya ya) na akpaghị aka n'ime ihe dị ka sekọnd 30.
(a) Eserese eserese nkeihe na-eme ka electro optic modulator dịdabere na VO2
(b) mgbanwe nke transmittance, reflectivity, absorptivity na reflection phase nwere ọkụ eletrik a ma ama
(c) eserese atụmatụ nke njikwa nwere ọgụgụ isi
Mmepe nke terahertz na-arụ ọrụ ma nwee ọgụgụ isiihe na-eme ka electro-optic modulator dịdabere na ihe eletrọniki ndị metụtara ya na-enye echiche ọhụrụ maka mmezu nke njikwa ọgụgụ isi nke terahertz. Ọrụ a nwetara nkwado site na National Key Research and Development Program, National Natural Science Foundation na High Magnetic Field Laboratory Direction Fund nke Anhui Province.
Oge ozi: Ọgọst-08-2023