An sami nasarar ƙera kayan aikin terahertz mai amfani da wutar lantarki

A shekarar da ta gabata, tawagar Sheng Zhigao, wani mai bincike a babban cibiyar filin maganadisu na cibiyar nazarin kimiyyar jiki ta Hefei, kwalejin kimiyya ta kasar Sin, ta ƙera na'ura mai ƙwazo da fasaha na terahertz na'ura mai amfani da wutar lantarki da ke dogaro da tsayin daka na gwaji na filin maganadisu. na'urar. An buga binciken a cikin ACS Applied Materials & Interfaces.

Kodayake fasahar terahertz tana da halaye na musamman da kuma fa'idodin aikace-aikace, aikace-aikacen injiniyanta har yanzu yana da matuƙar iyakancewa ta haɓakar kayan terahertz da abubuwan terahertz. Daga cikin su, iko mai aiki da hankali na terahertz wave ta filin waje shine muhimmin jagorar bincike a cikin wannan filin.

Yin niyya kan jagorar bincike mai zurfi na mahimman abubuwan terahertz, ƙungiyar binciken ta ƙirƙira mai sarrafa damuwa na terahertz dangane da graphene abu mai girma biyu [Adv. Kayan gani na gani. 6, 1700877(2018)], Terahertz broadband photocontrolled modulator dangane da oxide mai alaƙa mai ƙarfi [ACS Appl. Matar. Inter. 12, Bayan 48811(2020)] da sabon tushen phonon-mita-mai-mai sarrafa magnetic terahertz tushen [Babban Kimiyya 9, 2103229(2021)], an zaɓi fim ɗin oxide vanadium dioxide mai alaƙa a matsayin Layer mai aiki, tsarin multilayer. ana ɗaukar ƙira da hanyar sarrafa lantarki. Multifunctional aiki modulation na terahertz watsa, tunani da sha an samu (Hoto a). Sakamakon ya nuna cewa ban da watsawa da shayarwa, lokacin yin tunani da tunani kuma za a iya sarrafa shi ta hanyar filin lantarki, wanda zurfin tunani mai zurfi zai iya kaiwa 99.9% kuma lokacin tunani zai iya isa ~ 180o modulation (Figure b) . Mafi ban sha'awa, don cimma ikon sarrafa wutar lantarki na terahertz, masu binciken sun tsara na'urar tare da wani labari mai suna "terahertz - Electric-terahertz" feedback (Figure c). Ba tare da la'akari da canje-canje a cikin yanayin farawa da muhallin waje ba, na'ura mai wayo na iya isa ta atomatik saiti (wanda ake tsammani) ƙimar ƙirar terahertz a cikin kusan daƙiƙa 30.

(a) Tsarin tsari na wanielectro optic modulatorta hanyar VO2

(b) canje-canje na watsawa, tunani, shaye-shaye da lokacin tunani tare da burge halin yanzu

(c) zane-zane na sarrafa hankali

Haɓaka terahertz mai aiki da hankalielectrooptic modulatordangane da kayan lantarki masu alaƙa suna ba da sabon ra'ayi don fahimtar ikon sarrafa terahertz. Shirin Mabuɗin Bincike da Ci gaba na ƙasa, Gidauniyar Kimiyyar Halitta ta ƙasa da Asusun Jagoran Lantarki na Babban Magnetic Field na Lardin Anhui ne ya tallafa wa wannan aikin.