Uphando lwamva nje lweisixhobo sokubona ifoto se-avalanche
Itekhnoloji yokubona i-infrared isetyenziswa kakhulu ekuhloleni umkhosi, ukujonga okusingqongileyo, ukuxilongwa kwezonyango nakwezinye iinkalo. Ii-infrared detectors zemveli zinemida ethile ekusebenzeni, njengokuqonda ukufumanisa, isantya sokuphendula njalo njalo. Izixhobo ze-InAs/InAsSb Class II superlattice (T2SL) zineempawu ezintle kakhulu ze-photoelectric kunye nokulungiswa, okwenza ukuba zilungele ii-infrared infrared (LWIR) detectors. Ingxaki yokusabela okubuthathaka ekufumaneni i-infrared yamaza amade ibisoloko ixhalabisa ixesha elide, nto leyo ethintela kakhulu ukuthembeka kwezicelo zezixhobo ze-elektroniki. Nangona i-avalanche photodetector (Isixhobo sokubona ifoto se-APD) inempendulo egqwesileyo, inengxaki yokukhanya okumnyama okuphezulu ngexesha lokuphindaphinda.
Ukusombulula ezi ngxaki, iqela elivela kwiYunivesithi yeSayensi ye-elektroniki kunye neTekhnoloji yaseTshayina liphumelele ukuyila i-photodiode ye-infrared avalanche ye-Class II superlattice (T2SL) ye-high-performance Class II superlattice (T2SL) long-wave infrared avalanche (APD). Abaphandi basebenzise izinga eliphantsi le-auger recombination le-InAs/InAsSb T2SL absorber layer ukunciphisa umbane omnyama. Kwangaxeshanye, i-AlAsSb enexabiso eliphantsi le-k isetyenziswa njengomaleko wokuphindaphinda ukucinezela ingxolo yesixhobo ngelixa igcina inzuzo eyaneleyo. Olu yilo lubonelela ngesisombululo esithembisayo sokukhuthaza uphuhliso lwetekhnoloji yokufumanisa i-infrared yamaza amade. I-detector isebenzisa uyilo olunemigangatho emide, kwaye ngokulungelelanisa umlinganiselo wokwakheka kwe-InAs kunye ne-InAsSb, utshintsho olugudileyo lwesakhiwo sebhendi luyafezekiswa, kwaye ukusebenza kwe-detector kuyaphucuka. Ngokuphathelele ukhetho lwezinto kunye nenkqubo yokulungiselela, olu phononongo luchaza ngokweenkcukacha indlela yokukhula kunye neeparameter zenkqubo zezinto ze-InAs/InAsSb T2SL ezisetyenziselwa ukulungiselela i-detector. Ukuchonga ukwakheka kunye nobukhulu be-InAs/InAsSb T2SL kubalulekile kwaye uhlengahlengiso lweparameter luyadingeka ukuze kufezekiswe ibhalansi yoxinzelelo. Kwimeko yokufunyanwa kwe-infrared yamaza amade, ukuze kufunyanwe ubude obufanayo be-cut-off njenge-InAs/GaSb T2SL, kufuneka ixesha elinye le-InAs/InAsSb T2SL elinobukhulu obuthile. Nangona kunjalo, i-monocycle etyebileyo ibangela ukwehla kwe-absorption coefficient kwicala lokukhula kunye nokwanda kobunzima obusebenzayo bemingxuma kwi-T2SL. Kufunyaniswe ukuba ukongeza i-Sb component kunokufezekisa ubude be-cutoff wavelength ngaphandle kokwandisa kakhulu ubukhulu bexesha elinye. Nangona kunjalo, ukwakheka kwe-Sb okugqithisileyo kunokukhokelela ekwahlulweni kwezinto ze-Sb.
Ke ngoko, i-InAs/InAs0.5Sb0.5 T2SL eneqela le-Sb elingu-0.5 ikhethwe njengomaleko osebenzayo we-APDisixhobo sokubona iifoto. I-InAs/InAsSb T2SL ikhula kakhulu kwi-GaSb substrates, ngoko ke indima yeGaSb kulawulo loxinzelelo kufuneka iqwalaselwe. Ngokuyintloko, ukufezekisa ukulingana koxinzelelo kubandakanya ukuthelekisa i-avareji ye-lattice constant ye-superlattice ixesha elinye kunye ne-lattice constant ye-substrate. Ngokubanzi, uxinzelelo lokuxinana kwi-InAs luhlawulwa yi-compressive strain evezwe yi-InAsSb, nto leyo ebangela ukuba i-InAs ibe nkulu kune-InAsSb maleko. Olu phononongo lulinganise iimpawu zempendulo ye-photoelectric ye-avalanche photodetector, kubandakanya impendulo ye-spectral, umbane omnyama, ingxolo, njl.njl., kwaye luqinisekisile ukusebenza kakuhle koyilo lwe-step gradient layer. Isiphumo sokuphindaphinda kwe-avalanche se-avalanche photodetector siyahlalutywa, kwaye ubudlelwane phakathi kwe-multiplication factor kunye namandla okukhanya kwesiganeko, ubushushu kunye nezinye iiparameter ziyaxoxwa.
UMZOBO (A) Umzobo we-Schematic we-InAs/InAsSb long-wave infrared APD photodetector; (B) Umzobo we-Schematic weendawo zombane kumaleko ngamnye we-APD photodetector.
Ixesha leposi: Jan-06-2025