Iyini i-PIN photodetector

Yini aI-PIN photodetector

I-photodetector ibucayi kakhuluidivayisi ye-semiconductor photonicokuguqula ukukhanya kube ugesi ngokusebenzisa umphumela we-photoelectric. Ingxenye yayo eyinhloko yi-photodiode (PD photodetector). Uhlobo oluvame kakhulu lwakhiwe i-PN junction, i-electrode lead ehambisanayo kanye negobolondo leshubhu. Ine-unidirectional conductivity. Uma i-voltage eya phambili isetshenziswa, i-diode iqhuba; lapho kusetshenziswa i-voltage reverse, i-diode iyanqamuka. I-PD photodetector ifana ne-semiconductor diode evamile, ngaphandle kwalokhoIsitholi sesithombe se-PDisebenza ngaphansi kwe-voltage ehlehlayo futhi ingadalulwa. Ipakishwa ngefasitela noma ngoxhumo lwefiber optical, okuvumela ukukhanya ukuthi kufinyelele engxenyeni ezwela izithombe yedivayisi.

Khonamanjalo, ingxenye evame ukusetshenziswa kakhulu ku-PD photodetector akuyona i-PN junction kodwa i-PIN junction. Uma kuqhathaniswa nokuhlangana kwe-PN, ukuhlangana kwephinikhodi kunesendlalelo se-I esingeziwe phakathi nendawo. I-I layer iyingqimba ye-semiconductor yohlobo lwe-N ene-doping concentration ephansi kakhulu. Ngenxa yokuthi iyi-semiconductor ecishe ibe yi-Intrinsic ene-concentration ephansi, ibizwa nge-I layer. Isendlalelo I siwugqinsi futhi cishe sithatha yonke indawo yokuncipha. Iningi lamaphothoni esigameko amuncwe kungqimba lwe-I futhi akhiqize amapheya embobo ye-electron (abathwali abakhiqizwe izithombe). Kuzo zombili izinhlangothi zesendlalelo se-I kukhona ama-semiconductors ohlobo lwe-P kanye nohlobo lwe-N anokugxila okuphezulu kakhulu kwe-doping. Izendlalelo zika-P kanye no-N zizacile kakhulu, zimunca ingxenye encane kakhulu yamafotoni esigameko futhi zikhiqize inani elincane labathwali abakhiqizwe izithombe. Lesi sakhiwo singasheshisa kakhulu isivinini sokuphendula somphumela we-photoelectric. Kodwa-ke, indawo yokuncipha ebanzi kakhulu izonweba isikhathi sokukhukhuleka sabathwali abakhiqizwe izithombe endaweni yokuncipha, okuholela ekuphenduleni okunensayo. Ngakho-ke, ububanzi besifunda sokunciphisa kufanele kukhethwe ngokunengqondo. Isivinini sokuphendula se-PIN junction diode singashintshwa ngokulawula ububanzi besifunda sokuncipha.

I-PIN photodetector ingumtshina wemisebe enembayo ephezulu enesixazululo esihle kakhulu samandla kanye nokusebenza kahle kokubona. Ingakwazi ukukala ngokunembile izinhlobo ezihlukahlukene zamandla emisebe futhi izuze impendulo esheshayo nokusebenza kokuqina okuphezulu. Umsebenzi we-i-photodetectoriwukuguqula amasignali amaza okukhanya amabili ngemva kwefrikhwensi yebhithi ibe amasignali kagesi, kuqedwe umsindo wamandla owengeziwe wokukhanya kwe-oscillator yendawo, kuthuthukise isignali yefrikhwensi emaphakathi, futhi kuthuthukiswe isilinganiso sesignali-kumsindo. Ama-PIN photodetectors afaka isakhiwo esilula, ukusetshenziswa kalula, ukuzwela okuphezulu, ukuzuza okuphezulu, umkhawulokudonsa ophezulu, umsindo ophansi, nekhono eliqinile lokulwa nokuphazamiseka. Angasebenza ngokuzinzile ezindaweni ezihlukahlukene ezinokhahlo futhi asetshenziswa kakhulu ekutholeni isignali yesivalo sesivalo sokulinganisa umoya.