Inkqubela phambili yakutshanje kwiii-photodetectors ze-avalanche ezinovakalelo oluphezulu
Ubushushu obuphezulu begumbi 1550 nmisixhobo sokubona i-avalanche photodiode
Kwibhendi ye-infrared ekufutshane (i-SWIR), ii-avalanche diodes ezikhawulezayo uvakalelo oluphezulu zisetyenziswa kakhulu kunxibelelwano lwe-optoelectronic kunye nezicelo ze-liDAR. Nangona kunjalo, i-avalanche photodiode yangoku ye-avalanche ekufutshane ne-infrared (i-APD) elawulwa yi-Indium gallium arsenic avalanche breakdown diode (i-InGaAs APD) ibisoloko ithintelwe yingxolo ye-ionization engacwangciswanga yezixhobo zemveli ze-multiplier region, i-indium phosphide (i-InP) kunye ne-indium aluminium arsenic (i-InAlAs), nto leyo ekhokelela ekunciphiseni okukhulu kovakalelo lwesixhobo. Kwiminyaka edlulileyo, abaphandi abaninzi bakhangela ngenkuthalo izixhobo ezintsha ze-semiconductor ezihambelana neenkqubo ze-InGaAs kunye ne-InP optoelectronic platform kwaye zinokusebenza kwengxolo ye-ionization enempembelelo ephantsi kakhulu efana nezixhobo ze-silicon eninzi.
Isixhobo sokufumanisa ii-photodiode esitsha se-avalanche esingu-1550 nm sinceda uphuhliso lweenkqubo zeLiDAR
Iqela labaphandi e-United Kingdom nase-United States okokuqala ngqa liphumelele ekuphuhliseni i-photodetector entsha ye-APD ye-1550 nm enobukrelekrele obuphezulu kakhulu (isixhobo sokubona ifoto se-avalanche), inkqubela phambili ethembisa ukuphucula kakhulu ukusebenza kweenkqubo zeLiDAR kunye nezinye izicelo ze-optoelectronic.
Izixhobo ezintsha zibonelela ngeenzuzo eziphambili
Eyona nto iphambili kolu phando kukusetyenziswa kwezinto ezintsha. Abaphandi bakhethe iGaAsSb njengomaleko wokufunxa kunye neAlGaAsSb njengomaleko wokuphindaphinda. Olu yilo lwahlukile kwi-InGaAs/InP yendabuko kwaye luzisa iingenelo ezibalulekileyo:
1. Umaleko wokufunxa weGaAsSb: IGaAsSb inomlinganiselo ofanayo wokufunxa ne-InGaAs, kwaye utshintsho ukusuka kumaleko wokufunxa weGaAsSb ukuya kwi-AlGaAsSb (umaleko wokuphindaphinda) kulula, kunciphisa isiphumo somgibe kwaye kuphuculwe isantya kunye nokusebenza kakuhle kokufunxa kwesixhobo.
2. Umaleko wokuphindaphinda we-AlGaAsSb: Umaleko wokuphindaphinda we-AlGaAsSb ungcono kunomaleko wokuphindaphinda we-InP kunye ne-InAlAs wendabuko ekusebenzeni. Ubonakala kakhulu kwi-gain ephezulu kubushushu begumbi, i-bandwidth ephezulu kunye nengxolo engaphezulu kakhulu.
Ngezalathisi zokusebenza ezibalaseleyo
EntshaIsixhobo sokubona ifoto se-APD(i-avalanche photodiode detector) ikwabonelela ngophuculo olukhulu kwimilinganiselo yokusebenza:
1. Inzuzo ephezulu kakhulu: Inzuzo ephezulu kakhulu ye-278 ifikelelwe kubushushu begumbi, kwaye kutshanje uGqr. Jin Xiao uphucule ukwenziwa ngcono kwenkqubo kunye nokulungiswa kwesakhiwo, kwaye inzuzo ephezulu inyuswe ukuya kwi-M=1212.
2. Ingxolo ephantsi kakhulu: ibonisa ingxolo ephantsi kakhulu (F < 3, gain M = 70; F < 4, gain M = 100).
3. Ukusebenza kakuhle kwe-quantum: phantsi kwe-maximum gain, ukusebenza kakuhle kwe-quantum kuphezulu njenge-5935.3%. Uzinzo oluqinileyo lobushushu: uvakalelo lokuqhekeka kubushushu obuphantsi lumalunga ne-11.83 mV/K.
Umfanekiso 1 Ingxolo egqithisileyo ye-APDizixhobo zokufumana iifotoxa kuthelekiswa nezinye izixhobo zokubona ifoto ze-APD
Amathuba ezicelo ezibanzi
Le APD intsha inefuthe elibalulekileyo kwiinkqubo ze-liDAR kunye nezicelo ze-photon:
1. Umlinganiselo ophuculweyo wesignali-kwingxolo: Iimpawu zengxolo ephezulu kunye nezingaphantsi ziphucula kakhulu umlinganiselo wesignali-kwingxolo, nto leyo ibalulekileyo kwizicelo kwiindawo ezihlwempuzekileyo ze-photon, ezifana nokubeka esweni igesi yegreenhouse.
2. Ukuhambelana okuqinileyo: I-APD photodetector entsha (i-avalanche photodetector) yenzelwe ukuba ihambelane namaqonga e-indium phosphide (InP) optoelectronics angoku, okuqinisekisa ukuhlanganiswa okungenamthungo neenkqubo zonxibelelwano zorhwebo ezikhoyo.
3. Ukusebenza kakuhle kakhulu: Ingasebenza ngokufanelekileyo kubushushu begumbi ngaphandle kweendlela ezintsonkothileyo zokupholisa, nto leyo eyenza kube lula ukusasazwa kwezixhobo ezahlukeneyo ezisebenzayo.
Uphuhliso lwale fotodetector intsha ye-1550 nm ye-SACM APD (i-avalanche photodetector) imele impumelelo enkulu kweli candelo, Ijongana nemida ephambili enxulumene nengxolo engaphezulu kunye neemveliso ze-gain bandwidth kuyilo lwe-APD photodetector yendabuko (i-avalanche photodetector). Olu tshintsho kulindeleke ukuba luphucule amandla eenkqubo ze-liDAR, ngakumbi kwiinkqubo ze-liDAR ezingenamntu, kunye nonxibelelwano lwesithuba esikhululekileyo.
Ixesha leposi: Jan-13-2025