Yintoni i-PIN photodetector

Yintoni iIsixhobo sokubona ifoto sePIN

I-photodetector yinto ebukhali kakhuluisixhobo se-semiconductor photoniceguqula ukukhanya kube ngumbane ngokusebenzisa isiphumo se-photoelectric. Icandelo layo eliphambili yi-photodiode (i-PD photodetector). Uhlobo oluqhelekileyo lwenziwe yi-PN junction, ii-electrode leads ezihambelanayo kunye ne-tube shell. Ine-unidirectional conductivity. Xa kusetyenziswa i-forward voltage, i-diode iqhuba; xa kusetyenziswa i-reverse voltage, i-diode iyanqamka. I-PD photodetector ifana ne-semiconductor diode eqhelekileyo, ngaphandle kokubaIsixhobo sokubona ifoto sePDIsebenza phantsi kombane obuyela umva kwaye ingavezwa. Ipakishwe ngefestile okanye uqhagamshelo lwefayibha ye-optical, ivumela ukukhanya ukuba kufikelele kwinxalenye yesixhobo ebuthathaka kwifoto.

Okwangoku, eyona nto isetyenziswa kakhulu kwi-PD photodetector asikokudibana kwe-PN kodwa kukudibana kwe-PIN. Xa kuthelekiswa nokuhlangana kwe-PN, ukuhlangana kwe-PIN kunolunye ungqimba lwe-I embindini. Ungqimba lwe-I lulwaleko lwe-semiconductor yohlobo lwe-N olune-doping concentration ephantsi kakhulu. Ngenxa yokuba yi-semiconductor ephantse ibe yi-Intrinsic enoxinzelelo oluphantsi, ibizwa ngokuba yi-I layer. Ungqimba lwe-I lutyebile kwaye phantse luthatha yonke indawo yokuncitshiswa. Uninzi lwee-photon zeziganeko zifunxwa kwi-I layer kwaye zivelisa ii-electron-hole pairs (abathwali be-photogenerated). Kumacala omabini ongqimba lwe-I kukho ii-semiconductors zohlobo lwe-P kunye ne-N ezinamazinga aphezulu kakhulu okuncitshiswa. Ungqimba lwe-P kunye ne-N zincinci kakhulu, zifunxa inxalenye encinci kakhulu yee-photon zeziganeko kwaye zivelisa inani elincinci labathwali be-photogenerated. Olu lwakhiwo lunokukhawulezisa kakhulu isantya sempendulo yesiphumo se-photoelectric. Nangona kunjalo, ummandla wokuncitshiswa obanzi kakhulu uya kwandisa ixesha lokuhamba kwabathwali be-photogenerated kummandla wokuncitshiswa, nto leyo ekhokelela kwimpendulo ecothayo. Ke ngoko, ububanzi bommandla wokuncitshiswa kufuneka bukhethwe ngokufanelekileyo. Isantya sokuphendula se-PIN junction diode sinokutshintshwa ngokulawula ububanzi bendawo yokuncitshiswa.

I-PIN photodetector sisixhobo sokubona imitha esichanekileyo kakhulu esinesisombululo samandla esigqwesileyo kunye nokusebenza kakuhle kokufumanisa. Sinokulinganisa ngokuchanekileyo iintlobo ezahlukeneyo zamandla emitha kwaye sifumane impendulo ekhawulezileyo kunye nokusebenza okuzinzileyo okuphezulu. Umsebenzi weisixhobo sokubona iifotokukuguqula imiqondiso emibini yamaza okukhanya emva kokubetha rhoqo ibe yimiqondiso yombane, ukususa ingxolo eyongezelelweyo yokukhanya kwe-oscillator yendawo, ukuphucula isignali yefrikhwensi ephakathi, kunye nokuphucula umlinganiselo wesignali-kwingxolo. Ii-PIN photodetectors zinesakhiwo esilula, kulula ukuyisebenzisa, uvakalelo oluphezulu, inzuzo ephezulu, i-bandwidth ephezulu, ingxolo ephantsi, kunye nokukwazi okunamandla okulwa nokuphazamiseka. Zingasebenza ngokuzinzileyo kwiindawo ezahlukeneyo ezinzima kwaye zisetyenziswa kakhulu ekufumaneni isignali ye-lidar yokulinganisa umoya.