ShyirahoInGaAs foto detector
InGaAs ni imwe mu bikoresho byiza byo kugera ku bushobozi bwo gusubiza neza noicyuma gipima foto cyihuta cyaneUbwa mbere, InGaAs ni ibikoresho bya semiconductor bya bandgap bitaziguye, kandi ubugari bwa bandgap bushobora kugenzurwa n'ikigereranyo kiri hagati ya In na Ga, bigatuma hamenyekana ibimenyetso by'urumuri bitandukanye. Muri byo, In0.53Ga0.47As ihuye neza na lattice ya substrate ya InP kandi ifite ubushobozi bwo kwinjiza urumuri rwinshi cyane mu mugozi w'itumanaho rya optique. Niyo ikoreshwa cyane mu guteguraicyuma gipima fotokandi ifite imikorere myiza cyane y’umuraba wijimye n’uburyo bwo gukora. Icya kabiri, ibikoresho bya InGaAs na InP byombi bifite umuvuduko mwinshi wa electron drift, aho umuvuduko wabyo wa electron drift wuzuye uba 1 × 107cm / s. Hagati aho, mu bijyanye n’amashanyarazi yihariye, ibikoresho bya InGaAs na InP bigaragaza ingaruka zo gushyuha cyane, aho umuvuduko wabyo urenze urugero ugera kuri 4 × 107cm / s na 6 × 107cm / s uko bikurikirana. Bifasha kugera ku muvuduko wo hejuru wo kwambuka. Kuri ubu, ibikoresho bya InGaAs bipima foto ni byo bipima foto cyane mu itumanaho ry’amajwi. Ku isoko, uburyo bwo guhuza foto hagati y’ibice n’ibice nibyo bikunze gukoreshwa cyane. Ibikoresho byo gupima foto hagati y’ibice n ... Ariko, bitewe n’imbogamizi z’uburyo bwo guhuza, ibikoresho bipima impanuka zo hejuru biragoye guhuza n’ibindi bikoresho bipima amashanyarazi. Kubera iyo mpamvu, bitewe n’ubwiyongere bw’ubusabe bwo guhuza ibikoresho bipima amashanyarazi, ibikoresho bipima amashanyarazi bihuza InGaAs bifite imikorere myiza kandi bikwiriye guhuzwa byagiye biba intandaro y’ubushakashatsi buhoro buhoro. Muri byo, module za InGaAs zicuruza amashanyarazi ya 70GHz na 110GHz hafi ya zose zikoresha imiterere y’ibikoresho bipima amashanyarazi. Dukurikije itandukaniro ry’ibikoresho bipima amashanyarazi, ibikoresho bipima amashanyarazi bihuza InGaAs bishobora gushyirwa mu byiciro bibiri: bishingiye kuri INP na Si. Epitaxial y’ibikoresho kuri InP ifite ubuziranenge kandi ikwiriye cyane mu gukora ibikoresho bipima amashanyarazi menshi. Ariko, ku bikoresho bya III-V byakuriye cyangwa bifatanye kuri Si, bitewe n’uko ibikoresho bya InGaAs na Si bihura, ubwiza bw’ibikoresho cyangwa aho bihurira ni bubi cyane, kandi haracyari umwanya munini wo kunoza imikorere y’ibikoresho.
Gukomera kwa fotodecteur mu bintu bitandukanye bikoreshwa, cyane cyane mu bihe bikomeye, nabyo ni kimwe mu bintu by'ingenzi mu mikoreshereze ifatika. Mu myaka ya vuba aha, ubwoko bushya bw'ibikoresho bipima nk'ibinyabutabire bya perovskite, ibya kijyambere n'ibinyabutabire bibiri, byakuruye abantu benshi, biracyahura n'imbogamizi nyinshi mu bijyanye no kudahungabana igihe kirekire bitewe n'uko ibikoresho ubwabyo bigirwaho ingaruka zoroshye n'ibidukikije. Hagati aho, inzira yo guhuza ibikoresho bishya ntabwo igeze ku rwego rwo hejuru, kandi haracyakenewe ubushakashatsi bwimbitse kugira ngo umusaruro munini n'imikorere birusheho kuba myiza.
Nubwo gukoresha inductors bishobora kongera neza umuvuduko w'ibikoresho muri iki gihe, ntabwo bikunzwe muri sisitemu y'itumanaho rya digitale optique. Kubwibyo, uburyo bwo kwirinda ingaruka mbi kugira ngo urusheho kugabanya ibipimo bya RC by'igikoresho ni kimwe mu byerekezo by'ubushakashatsi bwa fotodecteur yihuta cyane. Icya kabiri, uko umuvuduko w'imashini zifata amashusho zihujwe na waveguide ukomeza kwiyongera, imbogamizi hagati ya bandwidth na responsivity itangira kongera kugaragara. Nubwo havuzwe fotodecteur za Ge/Si na InGaAs photodecteur zifite bandwidth ya 3dB irenga 200GHz, inshingano zazo ntizishimishije. Uburyo bwo kongera umuvuduko w'imashini mugihe ukomeza responsivity nziza ni ingingo y'ingenzi y'ubushakashatsi, ishobora gusaba ko hashyirwaho ibikoresho bishya bihuye n'imikorere (mobility nyinshi na high absorption coefficient) cyangwa imiterere mishya y'ibikoresho byihuta cyane kugira ngo bikemuke. Byongeye kandi, uko umuvuduko w'ibikoresho wiyongera, ikoreshwa ry'ibikoresho bifata amashusho muri microwave photonic links riziyongera buhoro buhoro. Bitandukanye n'igabanuka ry'ingufu nto z'amashanyarazi n'igenzura ry'ubuhanga mu itumanaho ry'amashanyarazi, iki kibazo, hashingiwe ku muvuduko w'ingufu nyinshi, gifite ingufu nyinshi zo gusaza kubera igabanuka ry'ingufu nyinshi. Ariko, ibikoresho bifite bandwidth nini akenshi bifata imiterere mito, bityo ntibyoroshye gukora ibyuma bipima ikirere byihuta kandi byuzuye, kandi hashobora gukenerwa andi mashya mu gukuramo no gukwirakwiza ubushyuhe bw'ibikoresho. Amaherezo, kugabanya umuvuduko wijimye w'ibikoresho bipima ikirere byihuta biracyari ikibazo ibyuma bipima ikirere bifite imiterere idahuye neza bigomba gukemura. Umuvuduko wijimye ufitanye isano ahanini n'ubwiza bwa kristu n'imiterere y'ubuso bw'ibikoresho. Kubwibyo, inzira z'ingenzi nka heteroepitaxy nziza cyangwa guhuza munsi ya sisitemu zidahuye neza bisaba ubushakashatsi bwinshi n'ishoramari.
Igihe cyo kohereza: Kanama-20-2025