Lipatlisiso tsa morao-rao tsaAvalanche photodetector
Theknoloji ea ho lemoha infrared e sebelisoa haholo tlhahlobong ea sesole, tlhahlobo ea tikoloho, tlhahlobo ea bongaka le likarolo tse ling. Lisebelisoa tsa khale tsa infrared li na le mefokolo e itseng ts'ebetsong, joalo ka kutloisiso ea ho lemoha, lebelo la ho arabela joalo-joalo. Lisebelisoa tsa InAs/InAsSb Class II superlattice (T2SL) li na le thepa e ntle ea photoelectric le tunability, e leng se etsang hore e be tse loketseng li-detectors tsa nako e telele tsa infrared (LWIR). Bothata ba karabelo e fokolang ea ho lemoha maqhubu a nako e telele ea infrared e 'nile ea tšoenyeha ka nako e telele, e leng ho fokotsang ho tšepahala ha lisebelisoa tsa elektronike. Leha ho le joalo avalanche photodetector (APD photodetector) e na le ts'ebetso e ntle ea karabelo, e na le boemo bo phahameng bo lefifi nakong ea ho ikatisa.
E le ho rarolla mathata ana, sehlopha se tsoang Univesithing ea Saense ea Elektronike le Theknoloji ea Chaena se atlehile ho etsa mochine o phahameng oa ts'ebetso oa Sehlopha sa II sa superlattice (T2SL) long wave infrared avalanche photodiode (APD). Bafuputsi ba sebelisitse sekhahla se tlase sa ho kopanya li-auger tsa InAs/InAsSb T2SL absorber layer ho fokotsa lefifi la hona joale. Ka nako e ts'oanang, AlAsSb e nang le boleng bo tlase ba k e sebelisoa e le sekhahla se atisang ho hatella lerata la sesebelisoa ha u ntse u boloka phaello e lekaneng. Moralo ona o fana ka tharollo e ts'episang bakeng sa ho khothaletsa nts'etsopele ea mahlale a malelele a ho lemoha a infrared. Mohloli o nka moralo o hatelitsoeng, 'me ka ho lokisa karolelano ea sebopeho sa InAs le InAsSb, phetoho e boreleli ea sebopeho sa sehlopha e ea fihlelleha,' me ts'ebetso ea detector ea ntlafatsoa. Mabapi le khetho ea thepa le mokhoa oa ho lokisetsa, thuto ena e hlalosa ka ho qaqileng mokhoa oa ho hōla le mekhoa ea ts'ebetso ea lisebelisoa tsa InAs/InAsSb T2SL tse sebelisetsoang ho lokisa detector. Ho khetholla sebopeho le botenya ba InAs/InAsSb T2SL ke ntho ea bohlokoa 'me ho hlokahala hore ho lokisoe parameter ho finyella tekanyo ea khatello ea kelello. Boemong ba ho lemoha ha maqhubu a nako e telele a infrared, ho finyella bolelele bo lekanang le ba InAs/GaSb T2SL, nako e le 'ngoe ea InAs/InAsSb T2SL e hlokahalang. Leha ho le joalo, monocycle e teteaneng e fella ka ho fokotseha ha coefficient ea ho monya ka lehlakoreng la kholo le ho eketseha ha boima bo sebetsang ba masoba T2SL. Ho fumanoe hore ho eketsa karolo ea Sb ho ka fihlella nako e telele ea cutoff wavelength ntle le ho eketsa boholo ba nako e le 'ngoe. Leha ho le joalo, sebopeho se feteletseng sa Sb se ka lebisa ho arohaneng ha likarolo tsa Sb.
Ka hona, InAs/InAs0.5Sb0.5 T2SL e nang le Sb group 0.5 e khethiloe e le lera le sebetsang la APD.photodetector. InAs/InAsSb T2SL e hola haholo-holo ho li-substrates tsa GaSb, kahoo karolo ea GaSb taolong ea mathata e hloka ho nahanoa. Ha e le hantle, ho finyella tekano ea khatello ho kenyelletsa ho bapisa lebone le tloaelehileng la "superlattice" bakeng sa nako e le 'ngoe le lesela la substrate. Ka kakaretso, khatello ea khatello ho InAs e lefshoa ke khatello ea khatello e hlahisoang ke InAsSb, e hlahisang sekhahla sa InAs se teteaneng ho feta InAsSb layer. Boithuto bona bo ile ba lekanya litšobotsi tsa karabelo ea photoelectric ea avalanche photodetector, ho kenyeletsoa karabelo ea spectral, lefifi la hona joale, lerata, joalo-joalo, 'me e netefalitse katleho ea moralo o hahelletsoeng oa gradient. Phello ea ho ata ha avalanche ea avalanche photodetector e hlahlojoa, 'me kamano pakeng tsa ntlha ea ho atisa le matla a khanya ea ketsahalo, mocheso le likarolo tse ling li tšohloa.
FEIE. (A) Setšoantšo sa schematic sa InAs/InAsSb nako e telele-wave infrared APD photodetector; (B) Setšoantšo sa moralo oa masimo a motlakase karolong e 'ngoe le e 'ngoe ea APD photodetector.
Nako ea poso: Jan-06-2025