Ubushakashatsi buheruka bwa avalanche Photodetector

Ubushakashatsi buheruka bwaifoto ya avalanche

Ikoranabuhanga rya Infrared detection rikoreshwa cyane mubushakashatsi bwa gisirikare, gukurikirana ibidukikije, gusuzuma ubuvuzi nizindi nzego. Imashini zisanzwe za infragre zifite aho zigarukira mumikorere, nko gutahura ibyiyumvo, umuvuduko wo gusubiza nibindi. InAs / InAsSb Icyiciro cya II superlattice (T2SL) ifite ibikoresho byiza byamafoto yumuriro kandi bigahinduka, bigatuma biba byiza kumashanyarazi maremare (LWIR). Ikibazo cyo gusubiza intege nke mumurongo muremure wa infragre yamenyekanye byabaye impungenge kuva kera, bigabanya cyane kwizerwa ryibikoresho bya elegitoroniki. Nubwo ifoto ya avalanche (APD ifotora) ifite igisubizo cyiza cyo gukora, ibabazwa numwijima mwinshi mugihe cyo kugwira.

Kugira ngo ibyo bibazo bikemuke, itsinda ryaturutse muri kaminuza y’ubumenyi n’ikoranabuhanga mu Bushinwa ryateguye neza superlattice yo mu cyiciro cya kabiri (T2SL) ndende-ndende ya infrarafarike ya fotodiode (APD). Abashakashatsi bakoresheje igipimo cyo hasi cya auger recombination ya InAs / InAsSb T2SL igabanya ibyuka kugirango bagabanye umwijima. Mugihe kimwe, AlAsSb ifite agaciro k k ikoreshwa nkigice cyo kugwiza kugirango urusaku rwibikoresho bikomeza inyungu zihagije. Igishushanyo gitanga igisubizo cyiza cyo guteza imbere iterambere rya tekinoroji ndende ya infragre. Detector ifata igishushanyo mbonera, kandi muguhindura ibipimo bya InAs na InAsSb, impinduka nziza yimiterere ya bande iragerwaho, kandi imikorere ya detector iratera imbere. Kubijyanye no guhitamo ibikoresho no gutegura inzira, ubu bushakashatsi busobanura muburyo burambuye uburyo bwo gukura nuburyo bwo gutunganya ibintu bya InAs / InAsSb T2SL ibikoresho byakoreshejwe mugutegura detector. Kumenya ibice nubunini bwa InAs / InAsSb T2SL nibyingenzi kandi birasabwa guhindura ibipimo kugirango ugere kuburinganire. Mu rwego rwo kumenya umurongo muremure wa infragre, kugirango ugere ku burebure buke bwa InAs / GaSb T2SL, hasabwa InAs / InAsSb T2SL igihe kinini. Nyamara, monocycle yibyibushye itera igabanuka rya coeffisente yo kwinjiza mu cyerekezo cyo gukura no kwiyongera kwinshi kwimyenge muri T2SL. Byagaragaye ko kongeramo ibice bya Sb bishobora kugera kumurongo muremure utagabanije cyane uburebure bwigihe kimwe. Ariko, Sb birenze urugero bishobora kuganisha ku gutandukanya ibintu bya Sb.

Kubwibyo, InAs / InAs0.5Sb0.5 T2SL hamwe na Sb itsinda 0.5 ryatoranijwe nkurwego rukora rwa APDgufotora. InAs / InAsSb T2SL ikura cyane kuri substrate ya GaSb, bityo rero uruhare rwa GaSb mugucunga ibibazo rugomba gutekerezwa. Mu byingenzi, kugera kuburinganire buringaniye bikubiyemo kugereranya impuzandengo ya lattice ihoraho ya superlattice mugihe kimwe na lattice ihoraho ya substrate. Mubisanzwe, ibibazo bya tensile muri InAs byishyurwa nubwonko bwo kwikuramo bwatangijwe na InAsSb, bikavamo igicucu cyinshi cya InAs kuruta igipimo cya InAsSb. Ubu bushakashatsi bwapimye ibiranga ifoto yerekana amashanyarazi ya fotodetekeri ya avalanche, harimo igisubizo cyerekanwa, umuyaga wijimye, urusaku, nibindi, kandi hanagenzurwa imikorere yubushakashatsi bwakozwe buhoro buhoro. Ingaruka yo kugwiza inkangu ya fotodetekeri ya avalanche irasesengurwa, kandi isano iri hagati yikintu cyo kugwiza nimbaraga zumucyo wabaye, ubushyuhe nibindi bipimo biraganirwaho.

FIG. (A) Igishushanyo mbonera cya InAs / InAsSb maremare maremare ya infragre ya APD ifotora; (B) Igishushanyo mbonera cyimirima yamashanyarazi kuri buri cyiciro cya fotodektor ya APD.