Iterambere ry'ubushakashatsi ku gikoresho cyo gupima foto cya InGaAs

Iterambere ry'ubushakashatsi ryaInGaAs foto detector

Bitewe n’ubwiyongere bukabije bw’ingano y’itumanaho, ikoranabuhanga ryo guhuza amakuru ryasimbuye ikoranabuhanga risanzwe ryo guhuza amashanyarazi, riba ikoranabuhanga rikuru ryo kohereza amakuru yihuta cyane mu ntera iri hagati n’irekure. Nk’igice cy’ingenzi cy’ihererekanyamakuru ry’amakuru,icyuma gipima fotoifite ibisabwa byinshi kugira ngo ikore neza cyane. Muri byo, icyuma gipima urumuri gihujwe n’amajwi (photodetector) ni gito, gifite umuvuduko munini, kandi cyoroshye guhuzwa na chip n’ibindi bikoresho by’ikoranabuhanga, ari nabyo byibandwaho mu bushakashatsi ku isuzuma ry’urumuri rwihuta. Kandi ni byo bikoresho bipima urumuri byihariye cyane mu itumanaho rya hafi rya infrared.

InGaAs ni kimwe mu bikoresho byiza byo kugera ku muvuduko wo hejuru noimashini zipima foto zikora cyaneUbwa mbere, InGaAs ni ibikoresho bya semiconductor bya bandgap bitaziguye, kandi ubugari bwabyo bwa bandgap bushobora kugenzurwa n'ikigereranyo kiri hagati ya In na Ga, bigatuma ibimenyetso by'urumuri bitandukanye by'uburebure bw'umurambararo. Muri byo, In0.53Ga0.47As ihuye neza na lattice ya InP substrate kandi ifite coefficient yo kwinjiza urumuri rwinshi cyane mu gice cy'itumanaho rya optique. Niyo ikoreshwa cyane mu gutegura fotodetekiteur kandi ifite imikorere myiza cyane y'umuraba wijimye n'imikorere. Icya kabiri, ibikoresho bya InGaAs na InP bifite umuvuduko mwinshi wa electron drift, hamwe n'umuvuduko wabyo wa electron drift uhagije ungana na 1 × 107cm / s. Hagati aho, mu busitani bwihariye bw'amashanyarazi, ibikoresho bya InGaAs na InP bigaragaza ingaruka zo gukubita cyane, hamwe n'umuvuduko wabyo wo gukubita cyane ungana na 4 × 107cm / s na 6 × 107cm / s. Bifasha kugera ku muvuduko wo hejuru wo gukubita. Kuri ubu, fotodetekiteur za InGaAs nizo fotodetekiteur zizwi cyane mu itumanaho rya optique. Nanone hakozwe ibikoresho bipima impanuka zo mu kirere bito, binini cyane, kandi bifite bandwidth nyinshi, bikoreshwa cyane cyane mu bikorwa nko mu muvuduko mwinshi no mu bwinshi.

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.

Icyo gikoresho gikoresha InGaAsP aho gukoresha InP nk'ibikoresho byo mu gace kangiritse. Nubwo kigabanya umuvuduko wo gukwirakwira kw'amashanyarazi ku rugero runaka, gituma urumuri ruhurirana kuva ku murongo w'amazi kugera ku gace kayinjizwamo. Muri icyo gihe, urwego rw'urumuri rwa InGaAsP N rurakurwaho, maze hakavuka icyuho gito kuri buri ruhande rw'ubuso bwa P, bikongera neza imbogamizi ku butaka bw'urumuri. Bifasha igikoresho kugera ku rwego rwo hejuru.