Kev tshawb nrhiav tshiab ntawmlub tshuab ntes duab av qeeg
Cov thev naus laus zis nrhiav infrared siv dav hauv kev soj ntsuam tub rog, kev saib xyuas ib puag ncig, kev kuaj mob thiab lwm yam teb. Cov khoom siv nrhiav infrared ib txwm muaj qee qhov kev txwv hauv kev ua haujlwm, xws li kev rhiab heev ntawm kev nrhiav, kev teb ceev thiab lwm yam. Cov ntaub ntawv InAs/InAsSb Class II superlattice (T2SL) muaj cov khoom zoo heev photoelectric thiab tunability, ua rau lawv zoo tagnrho rau cov khoom siv infrared ntev (LWIR). Qhov teeb meem ntawm kev teb tsis muaj zog hauv kev nrhiav infrared ntev tau yog qhov txhawj xeeb ntev, uas txwv tsis pub muaj kev ntseeg siab ntawm cov ntawv thov khoom siv hluav taws xob. Txawm hais tias avalanche photodetector (APD photodetector) muaj kev ua tau zoo heev, nws raug kev txom nyem los ntawm cov hluav taws xob tsaus ntuj thaum lub sijhawm sib ntxiv.
Txhawm rau daws cov teeb meem no, ib pab neeg los ntawm University of Electronic Science and Technology ntawm Tuam Tshoj tau ua tiav tsim ib qho kev ua tau zoo Class II superlattice (T2SL) ntev-nthwv infrared avalanche photodiode (APD). Cov kws tshawb fawb siv qhov qis dua auger recombination rate ntawm InAs/InAsSb T2SL absorber txheej kom txo qhov tsaus ntuj tam sim no. Tib lub sijhawm, AlAsSb nrog k tus nqi qis yog siv ua txheej multiplier los tswj lub suab nrov ntawm lub cuab yeej thaum tswj hwm qhov nce txaus. Qhov kev tsim no muab cov kev daws teeb meem zoo rau kev txhawb nqa kev txhim kho ntawm cov thev naus laus zis nrhiav infrared ntev. Lub tshuab ntes tau txais kev tsim qauv tiered, thiab los ntawm kev kho qhov sib piv ntawm InAs thiab InAsSb, qhov kev hloov pauv du ntawm cov qauv band tau ua tiav, thiab kev ua tau zoo ntawm lub tshuab ntes tau zoo dua. Hauv cov nqe lus ntawm kev xaiv cov khoom siv thiab cov txheej txheem npaj, txoj kev tshawb fawb no piav qhia txog cov txheej txheem kev loj hlob thiab cov txheej txheem ntawm InAs/InAsSb T2SL cov khoom siv siv los npaj lub tshuab ntes. Kev txiav txim siab qhov sib xyaw thiab tuab ntawm InAs/InAsSb T2SL yog qhov tseem ceeb thiab kev hloov kho parameter yog qhov yuav tsum tau ua kom ua tiav qhov sib npaug ntawm kev ntxhov siab. Hauv cov ntsiab lus ntawm kev tshawb pom infrared ntev-ntev, kom ua tiav tib lub wavelength txiav-tawm li InAs / GaSb T2SL, yuav tsum muaj InAs / InAsSb T2SL tuab dua. Txawm li cas los xij, monocycle tuab dua ua rau qhov coefficient nqus hauv kev coj ntawm kev loj hlob thiab kev nce ntxiv ntawm qhov loj ntawm cov qhov hauv T2SL. Nws pom tias kev ntxiv Sb Cheebtsam tuaj yeem ua tiav qhov ntev dua wavelength txiav tsis muaj kev nce ntxiv ntawm ib lub sijhawm tuab. Txawm li cas los xij, ntau dhau Sb muaj pes tsawg leeg tuaj yeem ua rau kev sib cais ntawm Sb cov ntsiab lus.
Yog li ntawd, InAs/InAs0.5Sb0.5 T2SL nrog Sb pawg 0.5 tau raug xaiv ua txheej txheem nquag ntawm APDlub tshuab ntes duab. InAs/InAsSb T2SL feem ntau loj hlob ntawm GaSb substrates, yog li lub luag haujlwm ntawm GaSb hauv kev tswj hwm kev ntxhov siab yuav tsum tau xav txog. Qhov tseem ceeb, kev ua tiav kev sib npaug ntawm kev ntxhov siab suav nrog kev sib piv qhov nruab nrab ntawm lattice tas li ntawm superlattice rau ib lub sijhawm rau lattice tas li ntawm substrate. Feem ntau, qhov kev ntxhov siab tensile hauv InAs raug them los ntawm qhov kev ntxhov siab compressive uas tau qhia los ntawm InAsSb, ua rau muaj txheej InAs tuab dua li txheej InAsSb. Kev tshawb fawb no ntsuas cov yam ntxwv teb photoelectric ntawm avalanche photodetector, suav nrog kev teb spectral, tam sim no tsaus nti, suab nrov, thiab lwm yam, thiab tau txheeb xyuas qhov ua tau zoo ntawm cov txheej txheem gradient. Cov nyhuv avalanche multiplication ntawm avalanche photodetector raug tshuaj xyuas, thiab kev sib raug zoo ntawm qhov sib npaug thiab lub zog teeb pom kev zoo, kub thiab lwm yam kev ntsuas tau tham txog.
DUAB (A) Daim duab qhia txog InAs/InAsSb long-wave infrared APD photodetector; (B) Daim duab qhia txog cov teb hluav taws xob ntawm txhua txheej ntawm APD photodetector.
Lub sijhawm tshaj tawm: Lub Ib Hlis-06-2025