Iyini i-PIN photodetector

KuyiniIsitholi sesithombe se-PIN

I-photodetector iyithuluzi elibucayi kakhuluidivayisi ye-semiconductor photoniceguqula ukukhanya kube ugesi ngokusebenzisa umphumela we-photoelectric. Ingxenye yayo eyinhloko yi-photodiode (i-PD photodetector). Uhlobo oluvame kakhulu lwakhiwe yi-PN junction, ama-electrode lead ahambisanayo kanye ne-tube shell. Ine-conductivity eqondiswe ngendlela eyodwa. Uma kusetshenziswa i-voltage yangaphambili, i-diode iyaqhuba; uma kusetshenziswa i-voltage ebuyela emuva, i-diode iyanqamuka. I-PD photodetector ifana ne-diode ejwayelekile ye-semiconductor, ngaphandle kwalokhoIsitholi sesithombe se-PDisebenza ngaphansi kwamandla kagesi abuyela emuva futhi ingadalulwa. Ipakishwa ngefasitela noma uxhumano lwefayibha yokukhanya, okuvumela ukukhanya ukuthi kufinyelele engxenyeni ezwela ukukhanya yedivayisi.

Okwamanje, ingxenye esetshenziswa kakhulu ku-PD photodetector akuyona i-PN junction kodwa i-PIN junction. Uma kuqhathaniswa ne-PN junction, i-PIN junction ine-I layer eyengeziwe phakathi. I-I layer iyi-N-type semiconductor ene-doping concentration ephansi kakhulu. Ngenxa yokuthi iyi-Intrinsic semiconductor ecishe ibe yi-Intrinsic ene-concentration ephansi, ibizwa ngokuthi i-I layer. I-I layer iwugqinsi futhi cishe ithatha yonke indawo yokuncishiswa. Iningi lama-photon e-incident amuncwa ku-I layer futhi ikhiqiza ama-electron-hole pair (abathwali abakhiqizwa yi-photo). Kuzo zombili izinhlangothi ze-I layer kukhona ama-P-type kanye nama-N-type semiconductor ane-doping concentration ephezulu kakhulu. I-P kanye ne-N layer zincane kakhulu, zimunca ingxenye encane kakhulu yama-photon e-incident futhi zikhiqiza inani elincane labathwali abakhiqizwa yi-photo. Lesi sakhiwo singasheshisa kakhulu isivinini sokuphendula komphumela we-photoelectric. Kodwa-ke, isifunda sokuncishiswa esibanzi kakhulu sizokwandisa isikhathi sokukhukhuleka kwabathwali abakhiqizwa yi-photo esifundeni sokuncishiswa, okuholela empendulweni ehamba kancane. Ngakho-ke, ububanzi besifunda sokuncishiswa kufanele bukhethwe ngokufanele. Isivinini sokuphendula se-PIN junction diode singashintshwa ngokulawula ububanzi besifunda sokuphelelwa amandla.

I-PIN photodetector iyisitholi semisebe esinembile kakhulu esinokulungiswa kwamandla okuhle kakhulu kanye nokusebenza kahle kokuthola. Ingalinganisa ngokunembile izinhlobo ezahlukene zamandla emisebe futhi ifinyelele impendulo esheshayo kanye nokusebenza okuzinzile okuphezulu. Umsebenzi weumshini wokuthola izithombeukuguqula izimpawu ezimbili zamagagasi okukhanya ngemva kwemvamisa yokushaya zibe izimpawu zikagesi, ukususa umsindo owengeziwe wokuqina kokukhanya kwendawo ye-oscillator, ukuthuthukisa isignali yemvamisa ephakathi, nokuthuthukisa isilinganiso sesignali-kuya-kumsindo. Ama-PIN photodetector afaka isakhiwo esilula, ukusebenziseka kalula, ukuzwela okuphezulu, inzuzo ephezulu, i-bandwidth ephezulu, umsindo ophansi, kanye nekhono elinamandla lokulwa nokuphazamiseka. Angasebenza ngokuqina ezindaweni ezahlukahlukene ezinzima futhi asetshenziswa kakhulu ekutholeni isignali ye-lidar yokulinganisa umoya.