Uphando lwamva nje lwei-avalanche photodetector
Itekhnoloji yokufumanisa i-infrared isetyenziswa ngokubanzi kuqwalaselo lwasemkhosini, ukujonga imekobume, ukuxilongwa kwezonyango kunye neminye imimandla. Izixhobo zokukhangela eziqhelekileyo ze-infrared zinezithintelo ezithile ekusebenzeni, ezifana nokuqonda ukuqonda, isantya sokuphendula njalo njalo. Izixhobo ze-InAs/InAsSb Class II superlattice (T2SL) zineepropathi ezigqwesileyo zefotoelectric kunye ne-tunability, ezenza zilungele i-long-wave infrared (LWIR) detectors. Ingxaki yempendulo ebuthathaka ekubhaqweni kwexesha elide le-infrared ibe yinkxalabo ixesha elide, elinciphisa kakhulu ukuthembeka kwezicelo zesixhobo sombane. Nangona i-avalanche photodetector (Isixhobo sokufota seAPD) inomsebenzi wokuphendula ogqwesileyo, inengxaki yobumnyama obuphezulu ngexesha lokuphindaphinda.
Ukucombulula ezi ngxaki, iqela elivela kwiYunivesithi yeSayensi ye-Electronic kunye neTekhnoloji yaseChina iye yaqulunqa ngempumelelo iClass II superlattice (T2SL) ye-long-wave infrared avalanche photodiode (APD). Abaphandi basebenzise ireyithi ye-auger ephantsi yokuhlanganiswa kwe-InAs/InAsSb T2SL absorber layer yokunciphisa ubumnyama bangoku. Kwangaxeshanye, i-AlAsSb enexabiso eliphantsi le-k isetyenziswa njengomaleko wokuphindaphinda ukucinezela ingxolo yesixhobo ngelixa ugcina inzuzo eyaneleyo. Olu luyilo lubonelela ngesisombululo esithembisayo sokukhuthaza uphuhliso lwetekhnoloji yokufumanisa i-infrared yamaza amade. I-detector ithatha idizayini ene-steped tiered, kwaye ngokulungelelanisa umlinganiselo wokubunjwa kwe-InAs kunye ne-InAsSb, ukuguqulwa okugudileyo kwesakhiwo sebhendi kuphunyeziwe, kwaye ukusebenza komtshina kuphuculwe. Ngokumalunga nokukhethwa kwezinto kunye nenkqubo yokulungiselela, olu pho nonongo luchaza ngokucacileyo indlela yokukhula kunye neeparitha zenkqubo ye-InAs/InAsSb T2SL yezinto ezisetyenziselwa ukulungiselela umtshina. Ukumisela ukubunjwa kunye nobukhulu be-InAs / InAsSb T2SL ibaluleke kakhulu kwaye uhlengahlengiso lweparameter luyafuneka ukuze kufumaneke ibhalansi yoxinzelelo. Kumxholo wokubhaqwa kwe-infrared ye-long-wave, ukufezekisa ubude obunqamlekileyo obufana ne-InAs/GaSb T2SL, i-InAs/InAsSb T2SL etyebileyo iyafuneka. Nangona kunjalo, i-monocycle etyebileyo ibangela ukuhla kwe-coefficient yokufunxa kwicala lokukhula kunye nokwanda kobunzima obusebenzayo bemingxuma kwi-T2SL. Kufunyaniswe ukuba ukongeza icandelo le-Sb kunokufikelela ubude bexesha elide ngaphandle kokunyusa ubukhulu bexesha elinye. Nangona kunjalo, ukubunjwa okugqithisileyo kwe-Sb kunokukhokelela ekwahlulweni kwezinto ze-Sb.
Ngoko ke, i-InAs/InAs0.5Sb0.5 T2SL kunye neqela le-Sb 0.5 likhethwe njengoluhlu olusebenzayo lwe-APD.isixhobo sokufota. I-InAs/InAsSb T2SL ikakhulu ikhula kwi-GaSb substrates, ngoko ke indima ye-GaSb kulawulo loxinzelelo kufuneka iqwalaselwe. Ngokusisiseko, ukuzuza ulungelelwaniso loxinzelelo kubandakanya ukuthelekisa umndilili welathisi ongaguquguqukiyo we-superlattice kwithuba elinye kunye neletiyisi engaguqukiyo yesubstrate. Ngokuqhelekileyo, i-tensile strain kwi-InAs ihlawulelwa yi-compressive strain evezwe yi-InAsSb, ekhokelela kuluhlu lwe-InAs olunzima kunoluhlu lwe-InAsSb. Olu phononongo lulinganise iimpawu zempendulo yombane we-avalanche photodetector, kubandakanywa impendulo ye-spectral, ubumnyama obukhoyo, ingxolo, njl. Isiphumo sokuphindaphinda kwe-avalanche ye-avalanche photodetector ihlalutywa, kwaye ubudlelwane phakathi kwento yokuphindaphinda kunye namandla okukhanya kwesiganeko, ubushushu kunye nezinye iiparameters zixoxwa.
IKHIWANE. (A) I-Schematic diagram ye-InAs/InAsSb ye-infrared APD photodetector; (B) Umzobo ocwangcisiweyo wamasimi ombane kwinqanaba ngalinye le-APD photodetector.
Ixesha lokuposa: Jan-06-2025