Yintoni iPIN photodetector

Yintoni naI-PIN yokufota

Ifotodetector yeyona nto inovelwano kakhuluisixhobo se-photonic semiconductoreguqula ukukhanya kube ngumbane ngokusebenzisa isiphumo sombane. Inxalenye yayo ephambili yifotodiode (PD photodetector). Olona hlobo luqhelekileyo luqulunqwe yi-PN junction, i-electrode ehambelanayo ikhokelela kunye negobolondo ityhubhu. Ine-conductivity ye-unidirectional. Xa i-voltage yangaphambili isetyenziswa, i-diode iqhuba; xa i-voltage ejikelezayo isetyenzisiweyo, i-diode iyanqumla. I-PD photodetector ifana ne-semiconductor diode eqhelekileyo, ngaphandle kokoPD ifotodetectorisebenza phantsi kombane obuya umva kwaye inokuvezwa. Ipakishwe ngefestile okanye uqhagamshelo lwefiber optical, evumela ukukhanya ukufikelela kwindawo ethatha ifoto yesixhobo.

Okwangoku, eyona nxalenye isetyenziswa ngokuqhelekileyo kwi-PD photodetector ayikho i-PN junction kodwa i-PIN junction. Xa kuthelekiswa ne-PN junction, i-PIN junction ine-I layer eyongezelelweyo phakathi. Umaleko we-I ngumaleko we-N-type semiconductor ene-concentration ye-doping ephantsi kakhulu. Kuba iphantse ibe yi-Intrinsic semiconductor enogxininiso oluphantsi, ibizwa ngokuba yi-I layer. I-Layer I ingqindilili kwaye iphantse yahlala kuwo wonke ummandla wokuncipha. Uninzi lweefotoni zezehlo zifunxwa kuluhlu lwe-I kwaye zivelise izibini ze-electron-hole (abathwali beefoto). Kumacala omabini e-I layer kukho i-P-type kunye ne-N-type semiconductors ene-doping concentrations ephezulu kakhulu. I-P kunye ne-N layers zincinci kakhulu, zifunxa umlinganiselo omncinci kakhulu weefotoni zesiganeko kwaye zivelise inani elincinci labathwali beefoto. Esi sakhiwo sinokukhawulezisa ngokukhawuleza isantya sokuphendula sesiphumo se-photoelectric. Nangona kunjalo, ummandla wokuncipha obanzi kakhulu uya kwandisa ixesha lokuhamba labathwali beefoto kwingingqi yokuncipha, endaweni yoko kukhokelela ekuphenduleni kancinci. Ngoko ke, ububanzi bommandla wokunciphisa kufuneka kukhethwe ngokufanelekileyo. Isantya sokuphendula se-PIN junction diode singatshintshwa ngokulawula ububanzi bommandla wokunciphisa.

I-PIN ye-photodetector yi-high-precision radiation detector enesisombululo esiphezulu samandla kunye nokusebenza kakuhle. Inokulinganisa ngokuchanekileyo iintlobo ezahlukeneyo zamandla emitha kwaye ifezekise ukuphendula ngokukhawuleza kunye nokusebenza kozinzo oluphezulu. Umsebenzi weifotodetectorkukuguqula imiqondiso emibini yokukhanya emva kokubetha kwezandi zibe ziimpawu zombane, ukuphelisa ingxolo eyongezelelweyo yokukhanya kwe-oscillator yendawo, ukunyusa umqondiso wefrikhwensi ephakathi, kunye nokuphucula umlinganiselo wesignali ukuya kwingxolo. I-PIN photodetectors ibonakalisa isakhiwo esilula, ukusetyenziswa lula, uvakalelo oluphezulu, inzuzo ephezulu, i-bandwidth ephezulu, ingxolo ephantsi, kunye nokukwazi ukuchasana nokuphazamiseka. Zinokusebenza ngokuzinzileyo kwiindawo ezahlukeneyo ezinoburharha kwaye zisetyenziswa ikakhulu ekubhaqweni kophawu lwelidar yomlinganiselo womoya.