Ƙananan kofa infrared avalanche photodetetector

Infrared low kofadusar ƙanƙara mai daukar hoto

Infrared avalanche photodetector (APD photodetector) aji nesemiconductor photoelectric na'urorinwanda ke samar da riba mai yawa ta hanyar tasirin ionization na karo, ta yadda za a iya cimma ikon gano ƴan photon ko ma photon guda ɗaya. Duk da haka, a cikin al'ada APD photodetector Tsarin, da wadanda ba ma'auni m watsawa tsari take kaiwa zuwa makamashi hasãra, kamar yadda avalanche kofa ƙarfin lantarki yawanci bukatar isa 50-200 V. Wannan yana sanya mafi girma buƙatun a kan na'urar ta drive ƙarfin lantarki da readout kewaye zane, kara farashin da iyakance fadi aikace-aikace.

Kwanan nan, bincike na kasar Sin ya ba da shawarar sabon tsarin dusar ƙanƙara kusa da na'urar gano infrared tare da ƙarancin wutar lantarki mai tsananin dusar ƙanƙara da ƙima. Dangane da homojunction na kai-doping na atomic Layer, avalanche photodetector yana magance cutarwar warwatse da ke haifar da yanayin lahani na mu'amala wanda babu makawa a cikin rashin daidaituwa. A halin yanzu, ana amfani da filin wutar lantarki mai ƙarfi na “kololuwa” na gida wanda aka jawo ta hanyar fasa kwatancen juzu'i don haɓaka hulɗar coulomb tsakanin masu ɗaukar kaya, da murkushe yanayin phonon na kashe jirgin sama wanda ya mamaye tarwatsawa, da kuma cimma babban aiki mai ninki biyu na masu ɗaukar kaya marasa daidaituwa. A cikin zafin jiki, ƙarfin kofa yana kusa da ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun bayanai (Misali shine tazarar band na semiconductor) kuma ƙwarewar gano mai gano dusar ƙanƙara ta infrared ya kai matakin photon 10000.

Wannan binciken ya ta'allaka ne akan atom-Layer self-doped tungsten diselenide (WSe₂) homojunction (tsararriyar karfe chalcogenide mai girma biyu, TMD) azaman matsakaicin riba don cajin mai ɗaukar nauyi. Ana samun karyewar juzu'i na fassarorin sararin samaniya ta hanyar ƙirƙira matakin maye gurbi don haifar da ingantaccen filin lantarki na “karu” na gida a mahaɗan mutant homojunction.

Bugu da kari, kauri na atomic na iya murkushe tsarin watsawa wanda yanayin phonon ya mamaye, kuma ya gane saurin haɓakawa da haɓakar mai ɗaukar nauyi mara daidaituwa tare da ƙarancin asara. Wannan yana kawo ƙarfin kofa na kankara a zazzabi na ɗaki kusa da ƙayyadaddun ka'ida watau madaidaicin kayan bandeji Misali. An rage yawan wutar lantarki daga 50 V zuwa 1.6 V, yana bawa masu binciken damar amfani da manyan da'irori na dijital masu ƙarancin ƙarfi don fitar da dusar ƙanƙara.mai daukar hotoda kuma fitar da diodes da transistor. Wannan binciken yana fahimtar ingantaccen juzu'i da amfani da kuzarin mai ɗaukar nauyi mara daidaituwa ta hanyar ƙira ƙarancin tasirin haɓakar ƙazamar ƙasa, wanda ke ba da sabon hangen nesa don haɓaka ƙarni na gaba mai mahimmanci, ƙananan kofa da babban riba mai fa'ida ta fasahar gano infrared.